
Legacy App Rewrite
Is your mobile app no longer meeting your business goals? Or is it technically outdated and hard to maintain? We help you rewrite or migrate your legacy mobile app by using the latest technology stacks.

Why rewrite your mobile app?
Stay competitive
Keep you app secure, maintainable and adaptable with state of the art technologies like Flutter or React Native.
Improve user experience
Update your app’s design and features to meet today's needs and expectations of your users.
Increase performance
Get rid of technical debt to improve your app’s performance, reliability, and security.
Our legacy app rewrite process
Transforming your legacy app starts with a clear plan. We assess your current app, identify areas for improvement and apply the latest technologies to rebuild your app:
We start by assessing your existing app to identify pain points, vulnerabilities and areas of improvement. Our goal is to understand your unique business goals and user needs.
Project in the spotlight: Immovlan
Immovlan now sees around 70 % of its users on mobile devices. After partnering with ACA Group to completely rebuild their app in Flutter, Immovlan achieved outstanding results:
- +50% daily visitors
- + 25% new users
- x3 total screen views
- x2 views per session
💜 Users love the new app’s faster loading speed. The search and map run smoothly, and the clean design makes it easy to use.


Our other mobile projects


Ecofix Gas & Power, an energy provider in the Belgian energy market, needed a strong brand identity and a digital solution to support its market entry. The challenge was to deliver both within a limited timeframe while enabling customers to manage their energy consumption. A brand identity and mobile app were developed to provide customer control over usage. This resulted in a fast go-to-market and improved customer engagement and self-service.

Contact our mobile experts
Talk to Jurgen and discover how ACA Group can support your mobile journey.

Contact our mobile experts
Talk to Jurgen and discover how ACA Group can support your mobile journey.

Mobile insights for you
Curious about the latest in mobile tech?
Check out our blog for fresh insights from our experts.

We need to talk about the "illusion of speed” in the age of AI.
Read more
A great mobile app isn’t just about flashy features or sleek design. It’s about a team that knows how to write maintainable code, make smart decisions, and -most importantly- always puts the user first. That’s exactly what our mobile team does every
Read more
Imagine starting as an intern, building your first Flutter app, learning from experienced colleagues... and gradually growing into a developer with increasing responsibility. That is exactly the path Jelle has taken at ACA. We sat down with him to ta
Read more