Let’s begin with a question: would you keep your money in a vault with a broken lock? Probably not! But that’s exactly what a mobile banking app feels like without proper security.

Mobile banking isn’t just a convenience anymore — it’s something people rely on every day. And when users trust an app with their hard-earned money, even one security slip-up can break that trust for good. The good news? Flutter banking mobile app development makes it easier to create apps that are both safe and smooth to use. And it’s not just a trend — it’s a proven choice: 

• According to a 2023 report by Statista, 46% of software developers prefer Flutter as a mobile app framework. 
• 75% of Flutter apps are built successfully in 9 minutes or less.
• The developers of Google Pay indicated that Flutter saved them 60-70% of their time because it is so much easier to operate.
   

With security and speed on your side, the real question is: how do you build a secure, compliant mobile banking app with Flutter? And why is Flutter the best tool for the job? Let’s break it down step by step. 

What is Flutter? 

Flutter is Google’s open-source, free software development kit (SDK) for developing cross-platform mobile apps. It allows developers to utilize a single platform-neutral codebase to build high-performance, scalable apps with visually rich user interfaces for both Android and iOS.  

Flutter mobile app development offers developers access to an extensive library of pre-built widgets, which allows developers — even those with minimal programming skills — to develop and deploy mobile apps very quickly. 

Google created Flutter in 2015 and officially launched it in 2018. Since then, developers have adopted it as their go-to toolkit. According to Statista, Flutter recently passed React Native as the top mobile app development framework. Its simplicity and ability to deliver native-like performance make it a popular choice worldwide. 

Businesses looking for Flutter mobile app development in New York and any other city in the world can use this framework to build secure, high-performance apps. It’s a fast and reliable option for creating apps that work smoothly on both Android and iOS. 

Why Flutter for Mobile Banking Apps? 

Being a fast and open-source framework, Flutter allows you to build apps for iOS and Android with a single codebase. This saves time and money. But that’s not all.  

Through its hot reload feature, Flutter enables developers to instantly observe implemented modifications during their work. This speeds up the development process. And it makes debugging easier. The following is why Flutter specifically works perfectly for banking application development: 

• High Performance: Flutter apps load quickly and run smoothly, with responsive animations. Perfect for users who want fast access to their accounts. 
• Customization: Flutter’s widget library makes it easy to design a unique, user-friendly app interface. 
• Strong Security: The framework supports secure storage and encryption options, critical for protecting sensitive financial data. 

The Importance of Security in Mobile Banking Apps 

Security is not up for debate. According to a report by IBM, the average cost of a data breach globally in 2024 was $4.88 million — and for banks, it’s even greater. Mobile banking apps are the first place hackers target, with sensitive information such as account numbers, passwords, and transaction history.

A single vulnerability can cause serious damage. That’s why many businesses turn to Flutter mobile app development services to build apps with strong security features, protecting users and preventing costly breaches. And the following points are what make your mobile banking app secure:

• Encryption: The application needs to use encryption to protect all data that moves between itself and the server. The implemented encryption technique blocks hackers from accessing the transferred information.  
• Secure Storage: All important data must be encrypted instead of being stored in a readable format. The data should undergo encryption procedures followed by secure storage methods.  
• Authentication: Multi-factor authentication (MFA) implements an additional security layer through its design. User authorizations prevent unauthorized access to the application through this security measure. 

Compliance: What You Need to Know? 

Security is just half the fight. Compliance is the other half. Mobile banking apps have to conform to strict compliance. These depend on the area. In America, for instance, banking apps have to abide by the Gramm-Leach-Bliley Act (GLBA). The law mandates banks to secure consumers’ data. 

In the EU, GDPR regulates. It mandates users to consent expressly to data collection and grants them access to see or delete their data. Choosing Flutter mobile app development will guarantee your app meets these complex specifications and is safe and easy to use. 

Non-compliance is expensive. In 2021, Amazon was fined $877 million for GDPR non-compliance. For small businesses, such fines are crippling. So, how do you become compliant?
Begin by familiarizing yourself with the regulation that pertains to your application. Then, institute the required safeguards. This may involve data encryption, secure authentication, and audits. 

Creating a Secure and Compliant Banking App With Flutter

Now, let’s talk about what really matters. With the right Flutter mobile app development, you can create an app that protects user data and meets industry standards. Here’s your guide.

1. Start with a Secure Architecture

The foundation of any secure app is its architecture. For Flutter apps, this means using a layered architecture. This separates the app into distinct layers.

Each layer has a specific function. For example, the presentation layer handles the user interface. The business logic layer manages app functionality. And the data layer handles data storage and retrieval. 

This separation makes the software easier to protect. If one layer is penetrated, the others remain secure. It also makes the software easier to update. Developers can upgrade a single layer without affecting the others.

2. Use Secure Storage

Sensitive data must never be stored as plain text. Rather, opt for secure storage options. Flutter has several libraries that can be used for this purpose. One such favored option is Flutter Secure Storage. This library encrypts data before saving it. 

It is cross-platform, supporting both iOS and Android. And it’s easy to add to your app.

Another option is Hive. Hive is a lightweight NoSQL database. It natively supports encryption. This makes it a great choice to store sensitive information. 

 3. Implement Strong Authentication

Authentication is paramount to mobile banking applications. Poor authentication can expose your application to compromise. So what is strong authentication? First, implement multi-factor authentication (MFA). It demands that the user provide two or more ways of identification. 

For example, a password and a fingerprint. This adds an extra layer of security. Second, use secure authentication protocols. OAuth 2.0 is a popular choice. It’s widely used and well-tested. It also supports MFA and it’s easy to integrate with Flutter.
 

4. Encrypt Data in Transit

Data exchanged between the app and server must be encrypted. This helps to keep hackers from intercepting it. The most popular method of doing so is with HTTPS. HTTPS encrypts data via TLS (Transport Layer Security). This keeps data safe while it is being transferred. 

Flutter has HTTPS support built in. But you must set your server up to use it. That means getting an SSL certificate. And setting your server up to use HTTPS.

5. Regularly Test for Vulnerabilities

Security is never-ending. Testing regularly enables you to identify and fix vulnerabilities prior to exploitation. There are many ways of assessing your app, such as penetration testing. 

This means practicing an attack against your app. The idea behind this is to find the vulnerabilities. Another alternative is code review. This means checking your code for vulnerabilities. This can be done by automated tools, but it’s also essential to do it by hand.

6. Stay Up-to-Date with Regulations

Compliance isn’t fixed. Regulations evolve with time. So it’s critical to keep yourself informed. This entails periodically reviewing the regulations that govern your app. And adjust your app accordingly. 

For example, in 2023, the U.S. Securities and Exchange Commission (SEC) launched new cybersecurity regulations. The new regulations mandate financial institutions to notify data breaches in 48 hours. If your app is based in the U.S., you must adhere to these regulations. 

Why Choose Flutter Mobile App Development Services in NY, USA? 

If you’re building a mobile banking app, you might consider hiring a professional. Companies offering Flutter mobile app development in New York can assist.  Such services maintain the expertise required to develop applications that achieve security compliance standards.  

The companies possess a thorough understanding of financial application regulations. They come to work with prior knowledge of Flutter development. This means you’ll have access to some of the best developers in the industry. 

These developers can help you build an app that’s both secure and user-friendly. Here are some key benefits of hiring Flutter mobile app development services in New York:

• Expertise in Financial Regulations: Legal regulatory knowledge of experts includes GDPR and PCI-DSS and banking standards to guarantee your app complies with all legal requirements.
• Secure App Development: Developers follow strong security protocols, including encryption, two-factor authentication, and secure APIs, to safeguard users’ data.
  
• Cross-Platform Compatibility: Flutter enables developers to develop software apps for iOS and Android, which operate the same way and reduce development costs.
  
• User-Centric Design: Experienced Flutter developers design user interfaces that are easy to use and engaging, with the goal of improving the customer’s banking experience.
   
• Faster Time-to-Market: The fast-launch capabilities provided by experienced teams allow them to start the application deployment process without sacrificing quality while delivering quick time-to-market results. 

What’s Next? 

The demand for mobile banking apps is booming, and to stand out, yours needs to be secure, reliable, and compliant. A well-built app builds trust and keeps it.

Need help? Expert Flutter mobile app development services like SoftProdigy can create an app that ticks all the security boxes.

With the right team, you can launch a safe, successful app that makes waves. Ready to bring your idea to life? Reach out to us and we’ll get your banking app secure, compliant, and ready to roll! 

FAQs:

Divya Chakraborty

Divya Chakraborty is the COO and Director at SoftProdigy, driving digital transformation with AI and Agile. She partners with AWS and Azure, empowers teams, and champions innovation for business growth.