Create a Piano App with JavaScript

My goal is to make a workable piano. Once I’ve made the piano, I want to be able to build a database of playable songs, to be able to play along to. Nothing fancy, like rock band, but just a simple piano app with songs that you can play along with. If you want to follow along, here’s my workable prototype that we’ll be working toward: https://my-little-piano-app.herokuapp.com/

This is a fun project, and would be a fun little game to make for your kids. So let’s get started. I’m breaking this project up into 3 main components:

1 The HTML

2 The JavaScript

3 The Node.JS Database

For the HTML, I originally wanted to make each key clickable, so the note would play on click. Later, I found that clicking each key achieved a much slower play, and an un-realistic sound. So I switched it up and assigned each sound to an individual key press. This allowed for more complex melodies and a more realistic sound. However, there are advantages to doing both, so in this tutorial, I’m going to show how you might go about doing either method, in case you want to follow along.

1a — HTML Keys

If you decide to do clickable keys, one problem you might run into very quickly is that keys are complex shapes. They fit around each other like puzzle pieces. In HTML and CSS, it’s easy to make squares and rectangles, but slightly harder to make more complex shapes. Since I wanted to have mouseover effects, I needed to have each key separate. Instead of trying to do simple rectangles and then figure out alignment and z-indexes, I went with a much harder, and unnecessary approach: svg polygons. The “SVG” tag allows you to create shapes that would otherwise be impossible. So I created each key with specific points in the shapes I wanted. So that you don’t have to figure that out yourself, I’m including those elements here:

<svg class="piano" height="230" width="1000">
  <polygon points="200,10 230,10 230,100 245,100 245,220 200,220 200,10" class="white"  id="c" data-key="65"/>
<polygon points=“245,100 260,100 260,10 275,10 275,100 290,100 290,220 245,220 245,100” class=“white” data-key=“83” id=“d”/>
<polygon points=“305,10 335,10 335,220 290,220 290,100 305,100 305,10” class=“white” data-key=“68” id=“e”/>
<polygon points=“335,10 365,10 365,100 380,100 380,220 335,220 335,10” class=“white” data-key=“70” id=“f”/>
<polygon points=“380,100 395,100 395,10 410,10 410,100 425,100 425,220 380,220 380,100” class=“white” data-key=“71” id=“g”/>
<polygon points=“425,100 440,100 440,10 455,10 455,100 470,100 470,220 425,220 425,100” class=“white” data-key=“72” id=“a”/>
<polygon points=“470,100 485,100 485,10 515,10 515,220 470,220 470,100” class=“white” data-key=“74” id=“b”/>
<polygon points=“515,10 545,10 545,100 560,100 560,220 515,220 515,10” class=“white” data-key=“82” id=“key5”/>
<polygon points=“560,100 575,100 575,10 590,10 590,100 605,100 605,220 560,220” class=“white” data-key=“84” id=“key5”/>
<polygon points=“605,100 620,100 620,10 650,10 650,220 605,220 605,100” class=“white” data-key=“89” id=“key5”/>
<polygon points=“650,10 680,10 680,100 695,100 695,220 650,220 650,10” class=“white” data-key=“85” id=“key5”/>
<polygon points=“695,100 710,100 710,10 725,10 725,100 740,100 740,220 695,220 695,100” class=“white” data-key=“73” id=“key5”/>
<polygon points=“740,100 755,100 755,10 770,10 770,100 785,100 785,220 740,220 740,100” class=“white” data-key=“79” id=“key5”/>
<polygon points=“785,100 800,100 800,10 830,10 830,220 785,220 785,100” class=“white” data-key=“80” id=“key5”/>
<polygon points=“230,10 260,10 260,100 230,100 230,10” class=“black” data-key=“49” id=“c_sharp”/>

<polygon points=“275,10 305,10 305,100 275,100 275,10” class=“black” data-key=“50” id=“d_sharp”/>

<polygon points=“365,10 395,10 395,100 365,100 365,10” class=“black” data-key=“51” id=“f_sharp”/>

<polygon points=“410,10 440,10 440,100 410,100 410,10” class=“black” data-key=“52” id=“g_sharp”/>

<polygon points=“455,10 485,10 485,100 455,100 455,10” class=“black” data-key=“53” id=“a_sharp”/>

<polygon points=“545,10 575,10 575,100 545,100 545,10” class=“black” data-key=“54” id=“key4”/>

<polygon points=“590,10 620,10 620,100 590,100 590,10” class=“black” data-key=“55” id=“key4”/>

<polygon points=“680,10 710,10 710,100 680,100 680,10” class=“black” data-key=“56” id=“key4”/>

<polygon points=“725,10 755,10 755,100 725,100 725,10” class=“black” data-key=“57” id=“key4”/>

<polygon points=“770,10 800,10 800,100 770,100 770,10” class=“black” data-key=“48” id=“key4”/>

</svg>

Each polygon element is enclosed in the SVG tag and is defined by a series of points. Eacn polygon is also assigned a class, either black or white, corresponding to either black or white keys. Here’s the class styles I made for those:

.white {

fill:white;

stroke:black;

stroke-width:1;

cursor:pointer;

margin:2px;

}

.white:hover {

fill:#9e9e9e;

stroke:lightblue;

cursor:pointer;

stroke-width:1;

outline: black solid 1px;

}

.black {

fill:black;

stroke-width:1;

cursor:pointer;

margin:2px;

}

.black:hover {

fill:#515151;

stroke:lightblue;

stroke-width:1;

outline: black solid 1px;

}

This defines the color and border, as well as the hover effects for each of the keys. Even though the black and white keys are next to each other on a keyboard, for me it was easier to group the black and white keys separately in the HTML document. Each polygon also has an ID. Most of the IDs correspond to the note associated with that polygon, starting at middle “C” all the way up to “B” of the next octave. You will also notice that in addition to an ID, each polygon element also has a data-key, with looks like this:

data-key=“80”

What this does, is it associates each element with key press. Each key on the keyboard has a number. So at this point we could either click the key on the screen, or press a keyboard key to get the program to play a sound for us. However, since the user won’t instinctively know which keyboard key corresponds to each sound, I’ve included a display in the HTML to show that to the user.

<div class=“keysNotes”>

<h3>note</h3>

<h3>c</h3>

<h3>d</h3>

<h3>e</h3>

<h3>f</h3>

<h3>g</h3>

<h3>a</h3>

<h3>b</h3>

<h3>c</h3>

<h3>d</h3>

<h3>e</h3>

<h3>f</h3>

<h3>g</h3>

<h3>a</h3>

<h3>b</h3>

</div>

<div id=“keysshow” class=“keysNumbers”>

<h3>keys</h3>

<h3>A</h3>

<h3>S</h3>

<h3>D</h3>

<h3>F</h3>

<h3>G</h3>

<h3>H</h3>

<h3>J</h3>

<h3>R</h3>

<h3>T</h3>

<h3>Y</h3>

<h3>U</h3>

<h3>I</h3>

<h3>O</h3>

<h3>P</h3>

</div>

Then, in the CSS for these classes, I have the following:

.keysNumbers {

color: lightgray;

font-size: 40px;

font-family: monospace;

font-weight: bold;

z-index: 10;

width: 740px;

display: flex;

flex-flow: row nowrap;

justify-content: space-between;

margin-left: 80px;

margin-top: -110px;

}

.keysNotes {

color: gray;

font-size: 40px;

font-family: monospace;

font-weight: bold;

z-index: 13;

width: 740px;

display: flex;

flex-flow: row nowrap;

justify-content: space-between;

margin-left: 80px;

margin-top: -150px;

}

This perfectly lines up the number and key display overlayed ontop of the on screen keys. Now, we need to bring in our audio files. I searched the internet, and found piano notes for each key I needed, except for F sharp, A sharp and both Fs. Since I had the other key sounds, I took those keys into a free program called audacity, and changed the pitch to the higher or lower pitch, and resaved the file to get the sound I needed. Audacity is a great tool for that, especially if you wanted to make something like a guitar player instead of a piano, but had limited recordings available to make your initial sounds. In any case, I don’t want you to have to go through all that trouble, so I’m providing the sounds I gathered here for free: https://www.dropbox.com/sh/buuc6h937s62vw2/AADHdRxmmDCfcatwjxvdwAvNa?dl=0

Next, I’m putting each of these files into the HTML with audio tags, and also including the key press codes we used earlier in the polygon elements.

<audio data-key=“65” id=“c_octave1_audio” src=“/middle_c.mp3”></audio>

<audio data-key=“49” id=“c_octave1_sharp_audio” src=“/mid_c_sharp.mp3”></audio>

<audio data-key=“83” id=“d_octave1_audio” src=“/middle_d.mp3”></audio>

<audio data-key=“50” id=“d_octave1_sharp_audio” src=“/mid_d_sharp.mp3”></audio>

<audio data-key=“68” id=“e_octave1_audio” src=“/middle_e.mp3”></audio>

<audio data-key=“70” id=“f_octave1_audio” src=“/middle_f.mp3”></audio>

<audio data-key=“51” id=“f_octave1_sharp_audio” src=“/mid_f_sharp.mp3”></audio>

<audio data-key=“71” id=“g_octave1_audio” src=“/middle_g.mp3”></audio>

<audio data-key=“52” id=“g_octave1_sharp_audio” src=“/mid_g_sharp.mp3”></audio>

<audio data-key=“72” id=“a_octave1_audio” src=“/middle_a.mp3”></audio>

<audio data-key=“53” id=“a_octave1_sharp_audio” src=“/mid_a_sharp.mp3”></audio>

<audio data-key=“74” id=“b_octave1_audio” src=“/middle_b.mp3”></audio>

&lt;audio data-key="82" id="c_octave2_audio" src="/high_c.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="54" id="c_octave2_sharp_audio" src="/high_c_sharp.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="84" id="d_octave2_audio" src="/high_d.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="55" id="d_octave2_sharp_audio" src="/high_d_sharp.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="89" id="e_octave2_audio" src="/high_e.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="85" id="f_octave2_audio" src="/high_f.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="56" id="f_octave2_sharp_audio" src="/high_f_sharp.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="73" id="g_octave2_audio" src="/high_g.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="57" id="g_octave2_sharp_audio" src="/high_g_sharp.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="79" id="a_octave2_audio" src="/high_a.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="48" id="a_octave2_sharp_audio" src="/high_a_sharp.mp3"&gt;&lt;/audio&gt;
&lt;audio data-key="80" id="b_octave2_audio" src="/high_b.mp3"&gt;&lt;/audio&gt;

You’ll probably want to include the audio files somewhere in your project, so that your HTML actually has access to them. Now that we have our audio, we could either code the keypresses or the onclicks to trigger the sound, or both.

If we go the onclick route, our JavaScript could look something like this:

function play(){

var audio = document.getElementById(“audio”);

audio.play();

}

Of course, replacing “audio” with whichever element we want to trigger the function. One side note, if we do nothing but this, you will run into a problem, where, if you click one button, and then a second, the second one won’t play until the first one has finished. So It’s nice to include a little extra in the function to stop any previous sounds, if a button is clicked, and then play only the sound that has been clicked.

Which way is better? OnClick or KeyPress? That’s entirely up to you, but here are the arguments for both. OnClick is better if your goal is to help you or someone else learn the piano. And Here’s why: If your program relies on keypress, then the user is more often going to associate the key played with the letter displayed on the key, and not the letter associated with the note. So you could have the “C” key play the “middle C” and so forth, but that only works if you only have one octave. And then “C sharp” etc is also tricky. Eventually you’re going to have the user pressing “G” to play “high F” and “S” to play “A sharp”. You can see how this would get confusing for someone who is trying to learn the piano. OnClick allows the user to only associate the sound with the displayed letter, not the letter on the keyboard. However, clicking for each sound leads to a much clunkier piano sound, that isn’t very fluid or easy to play. In my opinion, neither is really a great tool for learning a musical instrument, which is why I went with the keypress approach, which is just more fun to play. I took some of the JavaScript for that from a drum Kit in one of Wes Bos’s projects, but it’s a great approach for this type of project. Here’s what it looks like:

window.addEventListener(‘keydown’, function(e) {

const audio = document.querySelector(audio[data-key="${e.keyCode}"]);

const key = document.querySelector(.key[data-key="${e.keyCode}"]);

if (!audio) return;

audio.currentTime = 0;

audio.play();

key.classList.add(‘active’)

Instead of having to get each element by ID, you simply listen for a keypress, and match it with the corresponding data-key, which we already have in our HTML. It plays the sound associated with that keypress, which we already have in our HTML as well. Finally, we’re saying if there isn’t any audio, play it, and we’re setting the audio.currentTime to 0, which helps with the wait I mentioned earlier, allowing the key pressed to play, and stopping any other sounds currently still playing.

At this point you should be able to get your piano working either with keypresses or onclicks, whichever you prefer, and your piano is playable, hopefully. The only other thing I did extra was start a database of “sheet music” , so that you could select a song to play, and it will give you the notes for that song. You can see that in my example earlier.

The hard part for this, is that, there isn’t an easy shortcut. If you create a similar database, you would have to manually add the notes for each song in there yourself. However, if anyone has a great way to transpose sheet music into JSON data…I’m all “ears”.

Once I had the notes saved in a database, I could just make an api call when the song is selected and retrieve the notes associated with the selected song. You could also take it a step further, and let the song be played first, or any number of additional add-ons. Anyway, I hope you enjoy, and have as much fun with it as I did. If you have any feedback, please let me know!

Originally published on https://hackernoon.com

#web-development #javascript

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A Complete Process to Create an App in 2021

It’s 2021, everything is getting replaced by a technologically emerged ecosystem, and mobile apps are one of the best examples to convey this message.

Though bypassing times, the development structure of mobile app has also been changed, but if you still follow the same process to create a mobile app for your business, then you are losing a ton of opportunities by not giving top-notch mobile experience to your users, which your competitors are doing.

You are about to lose potential existing customers you have, so what’s the ideal solution to build a successful mobile app in 2021?

This article will discuss how to build a mobile app in 2021 to help out many small businesses, startups & entrepreneurs by simplifying the mobile app development process for their business.

The first thing is to EVALUATE your mobile app IDEA means how your mobile app will change your target audience’s life and why your mobile app only can be the solution to their problem.

Now you have proposed a solution to a specific audience group, now start to think about the mobile app functionalities, the features would be in it, and simple to understand user interface with impressive UI designs.

From designing to development, everything is covered at this point; now, focus on a prelaunch marketing plan to create hype for your mobile app’s targeted audience, which will help you score initial downloads.

Boom, you are about to cross a particular download to generate a specific revenue through your mobile app.

#create an app in 2021 #process to create an app in 2021 #a complete process to create an app in 2021 #complete process to create an app in 2021 #process to create an app #complete process to create an app

How to start an electric scooter facility/fleet in a university campus/IT park

Are you leading an organization that has a large campus, e.g., a large university? You are probably thinking of introducing an electric scooter/bicycle fleet on the campus, and why wouldn’t you?

Introducing micro-mobility in your campus with the help of such a fleet would help the people on the campus significantly. People would save money since they don’t need to use a car for a short distance. Your campus will see a drastic reduction in congestion, moreover, its carbon footprint will reduce.

Micro-mobility is relatively new though and you would need help. You would need to select an appropriate fleet of vehicles. The people on your campus would need to find electric scooters or electric bikes for commuting, and you need to provide a solution for this.

To be more specific, you need a short-term electric bike rental app. With such an app, you will be able to easily offer micro-mobility to the people on the campus. We at Devathon have built Autorent exactly for this.

What does Autorent do and how can it help you? How does it enable you to introduce micro-mobility on your campus? We explain these in this article, however, we will touch upon a few basics first.

Micro-mobility: What it is

You are probably thinking about micro-mobility relatively recently, aren’t you? A few relevant insights about it could help you to better appreciate its importance.

Micro-mobility is a new trend in transportation, and it uses vehicles that are considerably smaller than cars. Electric scooters (e-scooters) and electric bikes (e-bikes) are the most popular forms of micro-mobility, however, there are also e-unicycles and e-skateboards.

You might have already seen e-scooters, which are kick scooters that come with a motor. Thanks to its motor, an e-scooter can achieve a speed of up to 20 km/h. On the other hand, e-bikes are popular in China and Japan, and they come with a motor, and you can reach a speed of 40 km/h.

You obviously can’t use these vehicles for very long commutes, however, what if you need to travel a short distance? Even if you have a reasonable public transport facility in the city, it might not cover the route you need to take. Take the example of a large university campus. Such a campus is often at a considerable distance from the central business district of the city where it’s located. While public transport facilities may serve the central business district, they wouldn’t serve this large campus. Currently, many people drive their cars even for short distances.

As you know, that brings its own set of challenges. Vehicular traffic adds significantly to pollution, moreover, finding a parking spot can be hard in crowded urban districts.

Well, you can reduce your carbon footprint if you use an electric car. However, electric cars are still new, and many countries are still building the necessary infrastructure for them. Your large campus might not have the necessary infrastructure for them either. Presently, electric cars don’t represent a viable option in most geographies.

As a result, you need to buy and maintain a car even if your commute is short. In addition to dealing with parking problems, you need to spend significantly on your car.

All of these factors have combined to make people sit up and think seriously about cars. Many people are now seriously considering whether a car is really the best option even if they have to commute only a short distance.

This is where micro-mobility enters the picture. When you commute a short distance regularly, e-scooters or e-bikes are viable options. You limit your carbon footprints and you cut costs!

Businesses have seen this shift in thinking, and e-scooter companies like Lime and Bird have entered this field in a big way. They let you rent e-scooters by the minute. On the other hand, start-ups like Jump and Lyft have entered the e-bike market.

Think of your campus now! The people there might need to travel short distances within the campus, and e-scooters can really help them.

How micro-mobility can benefit you

What advantages can you get from micro-mobility? Let’s take a deeper look into this question.

Micro-mobility can offer several advantages to the people on your campus, e.g.:

• Affordability: Shared e-scooters are cheaper than other mass transportation options. Remember that the people on your campus will use them on a shared basis, and they will pay for their short commutes only. Well, depending on your operating model, you might even let them use shared e-scooters or e-bikes for free!
• Convenience: Users don’t need to worry about finding parking spots for shared e-scooters since these are small. They can easily travel from point A to point B on your campus with the help of these e-scooters.
• Environmentally sustainable: Shared e-scooters reduce the carbon footprint, moreover, they decongest the roads. Statistics from the pilot programs in cities like Portland and Denver showimpressive gains around this key aspect.
• Safety: This one’s obvious, isn’t it? When people on your campus use small e-scooters or e-bikes instead of cars, the problem of overspeeding will disappear. you will see fewer accidents.

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Best Electric Bikes and Scooters for Rental Business or Campus Facility

The electric scooter revolution has caught on super-fast taking many cities across the globe by storm. eScooters, a renovated version of old-school scooters now turned into electric vehicles are an environmentally friendly solution to current on-demand commute problems. They work on engines, like cars, enabling short traveling distances without hassle. The result is that these groundbreaking electric machines can now provide faster transport for less — cheaper than Uber and faster than Metro.

Since they are durable, fast, easy to operate and maintain, and are more convenient to park compared to four-wheelers, the eScooters trend has and continues to spike interest as a promising growth area. Several companies and universities are increasingly setting up shop to provide eScooter services realizing a would-be profitable business model and a ready customer base that is university students or residents in need of faster and cheap travel going about their business in school, town, and other surrounding areas.

Electric Scooters Trends and Statistics

In many countries including the U.S., Canada, Mexico, U.K., Germany, France, China, Japan, India, Brazil and Mexico and more, a growing number of eScooter users both locals and tourists can now be seen effortlessly passing lines of drivers stuck in the endless and unmoving traffic.

A recent report by McKinsey revealed that the E-Scooter industry will be worth― $200 billion to $300 billion in the United States, $100 billion to $150 billion in Europe, and $30 billion to $50 billion in China in 2030. The e-Scooter revenue model will also spike and is projected to rise by more than 20% amounting to approximately $5 billion.

And, with a necessity to move people away from high carbon prints, traffic and congestion issues brought about by car-centric transport systems in cities, more and more city planners are developing more bike/scooter lanes and adopting zero-emission plans. This is the force behind the booming electric scooter market and the numbers will only go higher and higher.

Companies that have taken advantage of the growing eScooter trend develop an appthat allows them to provide efficient eScooter services. Such an app enables them to be able to locate bike pick-up and drop points through fully integrated google maps.

List of Best Electric Bikes for Rental Business or Campus Facility 2020:

It’s clear that e scooters will increasingly become more common and the e-scooter business model will continue to grab the attention of manufacturers, investors, entrepreneurs. All this should go ahead with a quest to know what are some of the best electric bikes in the market especially for anyone who would want to get started in the electric bikes/scooters rental business.

We have done a comprehensive list of the best electric bikes! Each bike has been reviewed in depth and includes a full list of specs and a photo.

Billy eBike

 https://www.kickstarter.com/projects/enkicycles/billy-were-redefining-joyrides

To start us off is the Billy eBike, a powerful go-anywhere urban electric bike that’s specially designed to offer an exciting ride like no other whether you want to ride to the grocery store, cafe, work or school. The Billy eBike comes in 4 color options – Billy Blue, Polished aluminium, Artic white, and Stealth black.

Price: $2490

Available countries

Available in the USA, Europe, Asia, South Africa and Australia.This item ships from the USA. Buyers are therefore responsible for any taxes and/or customs duties incurred once it arrives in your country.

Features

• Control – Ride with confidence with our ultra-wide BMX bars and a hyper-responsive twist throttle.
• Stealth- Ride like a ninja with our Gates carbon drive that’s as smooth as butter and maintenance-free.
• Drive – Ride further with our high torque fat bike motor, giving a better climbing performance.
• Accelerate – Ride quicker with our 20-inch lightweight cutout rims for improved acceleration.
• Customize – Ride your own way with 5 levels of power control. Each level determines power and speed.
• Flickable – Ride harder with our BMX /MotoX inspired geometry and lightweight aluminum package

Specifications

• Maximum speed: 20 mph (32 km/h)
• Range per charge: 41 miles (66 km)
• Maximum Power: 500W
• Motor type: Fat Bike Motor: Bafang RM G060.500.DC
• Load capacity: 300lbs (136kg)
• Battery type: 13.6Ah Samsung lithium-ion,
• Battery capacity: On/off-bike charging available
• Weight: w/o batt. 48.5lbs (22kg), w/ batt. 54lbs (24.5kg)
• Front Suspension: Fully adjustable air shock, preload/compression damping /lockout
• Rear Suspension: spring, preload adjustment
• Built-in GPS

Why Should You Buy This?

• Riding fun and excitement
• Better climbing ability and faster acceleration.
• Ride with confidence
• Billy folds for convenient storage and transportation.
• Shorty levers connect to disc brakes ensuring you stop on a dime
• belt drives are maintenance-free and clean (no oil or lubrication needed)

**Who Should Ride Billy? **

Both new and experienced riders

**Where to Buy? **Local distributors or ships from the USA.

Genze 200 series e-Bike

 https://www.genze.com/fleet/

Featuring a sleek and lightweight aluminum frame design, the 200-Series ebike takes your riding experience to greater heights. Available in both black and white this ebike comes with a connected app, which allows you to plan activities, map distances and routes while also allowing connections with fellow riders.

Price: $2099.00

Available countries

The Genze 200 series e-Bike is available at GenZe retail locations across the U.S or online via GenZe.com website. Customers from outside the US can ship the product while incurring the relevant charges.

Features

• 2 Frame Options
• 2 Sizes
• Integrated/Removable Battery
• Throttle and Pedal Assist Ride Modes
• Integrated LCD Display
• Connected App
• 24 month warranty
• GPS navigation
• Bluetooth connectivity

Specifications

• Maximum speed: 20 mph with throttle
• Range per charge: 15-18 miles w/ throttle and 30-50 miles w/ pedal assist
• Charging time: 3.5 hours
• Motor type: Brushless Rear Hub Motor
• Gears: Microshift Thumb Shifter
• Battery type: Removable Samsung 36V, 9.6AH Li-Ion battery pack
• Battery capacity: 36V and 350 Wh
• Weight: 46 pounds
• Derailleur: 8-speed Shimano
• Brakes: Dual classic
• Wheels: 26 x 20 inches
• Frame: 16, and 18 inches
• Operating Mode: Analog mode 5 levels of Pedal Assist Thrott­le Mode

Norco from eBikestore

 https://ebikestore.com/shop/norco-vlt-s2/

The Norco VLT S2 is a front suspension e-Bike with solid components alongside the reliable Bosch Performance Line Power systems that offer precise pedal assistance during any riding situation.

Price: $2,699.00

Available countries

This item is available via the various Norco bikes international distributors.

Features

• VLT aluminum frame- for stiffness and wheel security.
• Bosch e-bike system – for their reliability and performance.
• E-bike components – for added durability.
• Hydraulic disc brakes – offer riders more stopping power for safety and control at higher speeds.
• Practical design features – to add convenience and versatility.

Specifications

• Maximum speed: KMC X9 9spd
• Motor type: Bosch Active Line
• Gears: Shimano Altus RD-M2000, SGS, 9 Speed
• Battery type: Power Pack 400
• Battery capacity: 396Wh
• Suspension: SR Suntour suspension fork
• Frame: Norco VLT, Aluminum, 12x142mm TA Dropouts

Bodo EV

http://www.bodoevs.com/bodoev/products_show.asp?product_id=13

Manufactured by Bodo Vehicle Group Limited, the Bodo EV is specially designed for strong power and extraordinary long service to facilitate super amazing rides. The Bodo Vehicle Company is a striking top in electric vehicles brand field in China and across the globe. Their Bodo EV will no doubt provide your riders with high-level riding satisfaction owing to its high-quality design, strength, breaking stability and speed.

Price: $799

Available countries

This item ships from China with buyers bearing the shipping costs and other variables prior to delivery.

Features

• Reliable
• Environment friendly
• Comfortable riding
• Fashionable
• Economical
• Durable – long service life
• Braking stability
• LED lighting technology

Specifications

• Maximum speed: 45km/h
• Range per charge: 50km per person
• Charging time: 8 hours
• Maximum Power: 3000W
• Motor type: Brushless DC Motor
• Load capacity: 100kg
• Battery type: Lead-acid battery
• Battery capacity: 60V 20AH
• Weight: w/o battery 47kg

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How long does it take to develop/build an app?

With more of us using smartphones, the popularity of mobile applications has exploded. In the digital era, the number of people looking for products and services online is growing rapidly. Smartphone owners look for mobile applications that give them quick access to companies’ products and services. As a result, mobile apps provide customers with a lot of benefits in just one device.

Likewise, companies use mobile apps to increase customer loyalty and improve their services. Mobile Developers are in high demand as companies use apps not only to create brand awareness but also to gather information. For that reason, mobile apps are used as tools to collect valuable data from customers to help companies improve their offer.

There are many types of mobile applications, each with its own advantages. For example, native apps perform better, while web apps don’t need to be customized for the platform or operating system (OS). Likewise, hybrid apps provide users with comfortable user experience. However, you may be wondering how long it takes to develop an app.

To give you an idea of how long the app development process takes, here’s a short guide.

App Idea & Research

_Average time spent: two to five weeks _

This is the initial stage and a crucial step in setting the project in the right direction. In this stage, you brainstorm ideas and select the best one. Apart from that, you’ll need to do some research to see if your idea is viable. Remember that coming up with an idea is easy; the hard part is to make it a reality.

All your ideas may seem viable, but you still have to run some tests to keep it as real as possible. For that reason, when Web Developers are building a web app, they analyze the available ideas to see which one is the best match for the targeted audience.

Targeting the right audience is crucial when you are developing an app. It saves time when shaping the app in the right direction as you have a clear set of objectives. Likewise, analyzing how the app affects the market is essential. During the research process, App Developers must gather information about potential competitors and threats. This helps the app owners develop strategies to tackle difficulties that come up after the launch.

The research process can take several weeks, but it determines how successful your app can be. For that reason, you must take your time to know all the weaknesses and strengths of the competitors, possible app strategies, and targeted audience.

The outcomes of this stage are app prototypes and the minimum feasible product.

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Create Music Streaming App Like Spotify

Interested in music application development like Spotify? We at AppClues Infotech help to build online music streaming and podcast apps like Spotify for iOS and Android. Hire our best designers & developers to build your own music streaming app like Spotify with customized features & functionality.

For more info:
Website: https://www.appcluesinfotech.com/
Email: info@appcluesinfotech.com
Call: +1-978-309-9910

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