Comprehensive Fitness App Development

I need a developer who can turn my business’s concept of an all-in-one fitness platform into a polished mobile app. The vision is a single place where users can plan workouts, follow meal guidance, and see clear progress analytics—all secured through a simple email-and-password sign-up flow.

To give you a quick snapshot of what I’m after, the finished build should at minimum cover:
• Workout routines with tracking (sets, reps, timers, etc.)
• Diet and nutrition plans that users can follow and log
• Progress dashboards with charts or other visuals so users easily understand their gains

Clean onboarding, profile creation, and email/password authentication are mandatory, and I’d like an intuitive interface that feels cohesive across both iOS and Android. If you prefer React Native, Flutter, or native stacks, let me know which you feel will serve best and why; I’m open as long as performance remains smooth and future feature additions stay straightforward.

Please outline your proposed tech stack, estimated timeline, and any relevant portfolio pieces so I can see how you’ve solved similar challenges before. I’m ready to move quickly once I find the right match.