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How to Make a Flutter App with High Security?

In 2020, people are excessively accessing their smartphones. Right from online banking, chatting, shopping to handling your online businesses, people these days are not only greatly depending on the mobile apps but also keeping sensitive data in mobile phones.

According to analytics, 57% of the digital media time is spent on using smartphones and tablets.

Did you know:

  • Mobile apps were downloaded for over 204 billion times in 2019 and with the increasing usage of applications, it is for sure that figures must be jumped to the next level in the coming years.
  • The forecast from Juniper Research report reveals that approx 2 million people that is around 40% of the world’s adult population, are approaching online banking apps.

With the increasing usage of mobile apps these days, app security has become one of the serious issues for developers and users.

No matter whether you are an iOS or an Android user, applications tend to contain critical vulnerabilities on both platforms.

Just have an idea with the below image:

So in this post, we will discuss how to increase the security of the Flutter based applications and minimize the risk of vulnerabilities in the application…Why it is important to hire a flutter developer and what are the benefits of choosing Flutter for mobile app development.

However, before jumping on the tips to increase the security of the Flutter based applications, we need to understand “what are the common vulnerabilities and security issues arises in the mobile app?”.

5 Biggest App Security Risks and Solutions That App Owners Should Aware of in 2020

According to the Gartner Reports, 75% of the mobile apps fail to clear mobile security tests that ultimately put your sensitive data and documents at high risk.

So here are the common security risks that every app owner should take it seriously:

1. Unauthorized Access To Your App

Providing access to the app without verifying the user’s authentication is the biggest security risk. So the app must be ensuring that the user should be a true user and should temporarily lock the access in case of multiple failed login attempts.

**Solution: **Flutter always puts the app security at the top list, therefore, providing developers with the security and authentication plugins. By integrating this sign-in plugin to your app, you can easily add a user authentication verify check to your app. Also, you can ask any app development company for a better solution with the official plugins.

Pro Tip:_ To enhance the security of your app, always integrate official security plugins of Flutter instead of handling app verification yourself. For instance, you can integrate Google sign-in plugin for Google Authentication._

2. Leaking of Sensitive Data

These days, with the excessive usage of the mobile phone, your mobile apps have all the sensitive data right from your user IDs, password, PIN, financial details, personal details, and more. Your sensitive data can be easily compromised if the app security controls fail to be implemented rightly in the app. The weak app security can allow unauthorized parties to access all the information on your app.


Flutter provides a secure data storage plugin for both the leading operating systems with the name of**_ NSUserDefault for iOS and SharedPreferences for Android_**. These plugins provide a secure storage facility but it is recommended to avoid storing your sensitive data including passwords and PIN numbers.

_Pro Tip: _Like most mobile apps, is your mobile app also using in-memory cache to provide quick access by directly fetching the data from the stored memory? If yes, then you need to think twice, that is why you are keeping all the data on the mobile all the time. You should consider the core security principles that ask you to only keep the data that you often need. To keep your data safe, it is worth setting up a periodic time for automatically cleaning the data cache that has been expired.

When using a Flutter based app, it always provides the information when you are about to switch to background mode. You can access the information to set up a timer for regular clean-ups of the cache with the permission of the user.

3. Session ID Attacks by the Unauthorised User

Either intentionally or unintentionally, sometimes anyone can try to steal the sensitive information of your phone or may even try to steal the identity of the valid user. For example, you lend your phone to your friend for playing games or allow any guest at your home to access your phone, they can try to access the information that you want to keep it private from them.

Or sometimes, any colleague can intentionally try to access your corporate email to steal important information. The best way to protect information is to integrate some unpredictable passwords or locks to your phone that can’t be cracked by unauthorized users.


Despite using the device-level security (Unlock Screen), it is important to integrate app-level authentication to keep the sensitive data remain private and secure in the app. In fact, app-level authentication can add an additional layer of protection to mobile content. Therefore, Flutter provides special authentication plugins like TouchID for iOS and FP Sensor for Android apps to uplift the app security.

_Pro Tip: _Since numerical or alphabetical passwords are predictable, therefore it is advised to use only officially approved fingerprint or touch ID locks. Moreover, it adds more convenience to access it multiple times and secures your data from malicious users.

4. Code Injections Via Malicious User

Code injections are one of the most common practices by the attackers that access the database of your app and insert the unauthorized codes into the existing coding. Injecting unwanted codes can result in major issues like data loss or corruption, a total takeover of the app, or denial of access as well. The scariest thing about it is, that this type of attack isn’t so hard to execute.


Developers can easily increase the security of the Flutters apps as all the plugins come up with the required permissions that are already baked into the plugin code. So if you are integrating officially approved plugins in the app, you don’t need to further add additional codes for unauthorized code injection. Moreover, it is advised to hire a software development company for quick assistance.

_Pro Tip: _In case your app has native codes, then it is required to add additional permissions to your app to avoid putting the sensitive data at risk.

5. Securing The Smaller App Window

It’s common to switch to another task by accessing the smaller windows of the app. But unfortunately, the smaller windows of your app can still show the content to the user in the minimized window. The malicious user can easily get the information from this small screen despite having your app protected from the additional measures such as Touch IDs or face scanning. Flutter app development companies can easily understand the pain of the users and implement such strategies to secure your app from malicious users.


Flutter is not providing any official plugin to secure your app window as the implementation process is depending on the native APIs and application life cycles. However, still, there is a hope to enhance its security of your app. Hire a Flutter developer as Flutter provides detailed instructions to secure your app window for both OS.

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How to Make a Flutter App with High Security?

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.


If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.


A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.


New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

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Idrish Dhankot

Idrish Dhankot


Hire Dedicated Flutter App Developer USA| Flutter App Developers

Hire Flutter App Developers: WebClues Infotech is a Flutter App Development company. Our Flutter mobile app development team can create cross-platform apps for different industry verticals. Our Flutter developers will help you extend your business’s scope by developing enhanced functionality and a feature-rich app. To provide a rich user experience to your users, hire dedicated Flutter app developers from WebClues Infotech today!

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How much does it cost to make a Flutter app for your business?

Google’s Flutter may be a hot topic lately. This promising technology is often seen fixing new benchmarks and recognition among mobile app developers. Flutter app development is unquestionably an ideal match for everybody trying to find a strong mobile app for his or her next big project. Features like easy usability, fast to code also as compatibility to different platforms validate its success & popularity among global mobile app developers.

Featuring Flutter’s incredible features, during this answer, we are making you conscious of the estimated Flutter mobile app development cost for your new project and the way it is often an economical solution of building a feature-loaded mobile app at a lower cost.

How Flutter App is often an honest fit Your Business?

Flutter comes up with numerous benefits, a number of them being:

  • Flutter platform serves your development purpose for free of charge.
  • This open-source platform is straightforward to find out & work upon.
  • Flutter comes alongside several speedy and customizable widgets.
  • Flutter doesn’t have any compatibility issues with any platform- iOS or Android, unlike other applications.
  • Flutter features a highly expedited development time.
  • Backed by Google, the framework is credible, reliable, accepted by all with a huge community support forum.
  • Flutter may be a hybrid platform and hence helps in providing a wider reach than other applications.
  • The development of the Flutter app is predicated on one codebase that saves time within the process of testing the appliance across different platforms.

How Much Does It Cost to Develop A Flutter App? Factors Determining Cost

Following factors play an excellent role choose the essential cost of the Flutter app development:

  • Hours It takes to UI/UX Design
  • Overall Development Time
  • Backend Server
  • Developer Cost
  • The Complexity of the App
  • Total Hardware Costs
  • App Category
  • Maintenance of the App
  • Location of the event Company

Flutter is way Cost-Effective than Other Platforms

Flutter will go an extended thanks to supporting smaller requirements of a business. the rationale is its cross-platform capabilities within the development that creates it an excellent framework for app development within the future.

Research says that “Flutter applications within the market within the present scenario structure about 0.21% of the apps available with a 0.04% installation rate. Flutter apps are counted within the top apps category with an installation rate of 0.05%.”

It is no wonder that Google’s Flutter is driving the expansion of the appliance development industry to an excellent extent. The framework is often seen helping businesses structure an app with good features and styles at a lower budget and limited requirements.

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Best Flutter App Development Company

Are you looking for the best flutter app development company? Then AppClues Infotech is the leading flutter app development company in USA offering the best service worldwide. We focused on developing hybrid mobile apps on Android & iOS and assures our end-user about exceptional and functionally-rich mobile apps.

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Best Flutter App Development Company in USA & India

AppClues Infotech is one of the best flutter app development company in USA & India. Our diverse and experienced team of developers can help you sketch the smartest and quickest solution for your mobile app development projects with the most superior technology.

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

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