Flexii - Case Study

Case study FlutterFlow Mobile App HealthTech Firebase

Personalized fitness plans and gamified workouts – in under 3 months

30 days

personalized training plan for every user

Gamified

badges for streaks and milestones

Native-ready

Native mobile app in Flutterflow

About Flexii

Flexii is a mobile fitness app that helps users improve their mobility and stay consistent with exercise. Starting with a short onboarding survey and a mobility test, the app generates a personalized 30‑day workout plan. Users can track progress, earn badges for streaks, and access a library of diverse exercises to keep routines fresh and engaging.

About Personit

At Personit, we help startups and scaling businesses move from idea to real product — up to 5x faster than traditional dev teams. We specialize in low-code platforms and AI-powered development.

Challenge

Flexii's founders came to us with a clear brief:

Native iOS app with smooth, premium user experience
Advanced mobility test assessing fitness and body flexibility
Personalized training plans tailored to test results
Gamification system with badges, experience points, and playlists
Exercise library divided by sports and skill levels
Subscription model with 14-day free trial
Push notifications for workout reminders

And they needed it built fast on FlutterFlow, ready for App Store deployment.

Key Functionalities

Advanced mobility test assessing body flexibility and fitness

Automated personalized training plan tailored to test results

Gamification system with badges, experience points (XP), and achievements

Exercise library divided by sports and skill levels

Custom workout playlist creation

Subscription model with 14-day free trial

Push notifications for workout reminders

Secure Google and Apple ID login

Why low-code + AI?

Flexii needed a native iOS app built fast, without compromising quality.

FlutterFlow allowed us to:

Build a native iOS app with excellent performance
Create complex features like mobility testing and plan personalization
Connect directly to Firebase for scalable backend support
Implement gamification, subscriptions, and push notifications

The result? A fully functional native iOS app ready to scale and expand with new social features.

Built in FlutterFlow – Native Quality in Record Time

Develop mobile apps with native feel at record speed

Integrate backend services directly without heavy custom code

Deliver clean, well-structured projects for future in-house scaling

Test ideas fast without sacrificing user experience

Our team has delivered over 100+ production-grade apps using technologies such as React, FlutterFlow, Bubble, Supabase, Firebase and AI-enhanced tooling. That experience allows us to go fast without cutting corners – a key differentiator in the low-code space.

The Results

In under 3 months, Flexii launched a fully functional native iOS mobile app.

Built a native iOS app with advanced mobility testing and personalized plans

Implemented comprehensive gamification with badges, XP, and playlists

Integrated subscription model with 14-day free trial

Created exercise library divided by sports and skill levels

Launched in App Store with full functionality and scalability

Our Approach

Discovery

Prototype

Rapid development

QA / Iteration

Who built it

Szymon

Mobile Developer

Szymon is a mobile application creator who transforms ambitious visions into working products. He passionately builds scalable solutions that combine modern technologies with excellent user experience. His strength lies in rapid prototyping and iteration – bringing client ideas to life as functional applications in record time. He masterfully combines strategic thinking with practical development approach, delivering products ready to scale.

Maks

Mobile & Automation Developer

Maks is a developer who effortlessly jumps between technologies, bringing the latest solutions and trends to the team. He specializes in mobile development and intelligent process automation (n8n + AI), transforming complex business challenges into efficient systems. When a project demands it, he boards a plane without hesitation and flies directly to the client – regardless of country or time zone. In his free time, he proves his skills by winning hackathons. His superpowers are technological versatility, hunger for innovations, and readiness to take on ambitious challenges.