AI-APEX - Personalized Fitness & Nutrition Coaching Powered by Generative AI
AI-APEX App
An AI fitness coach that builds adaptive programs based on goals, recovery, and real-time performance.
Metaviz AI proudly partnered on the development of AI-APEX - a fully AI-powered fitness, nutrition, and hybrid coaching platform that creates personalized workout plans, custom meal plans, and progress-based recommendations using Vision AI + Generative AI. From photo-based body comparison to AI-generated workout demo videos, this app brings true personal coaching into one seamless experience.
AI-APEX proves how AI automation can reshape the future of fitness apps with smarter personalization, better UX, and adaptive planning. This project included building a complete AI engine that understands user data, nutritional requirements, equipment availability, and physique goals - and then adapts weekly based on real user progress.
- AI fitness coaching app
- Generative AI workouts
- Vision AI body comparison
- Personalized meal planning
- AI workout video generation
- Adaptive training plans
- GPT-4o fitness app
- Macro-based nutrition
- Cross-platform fitness app
- AI personal trainer
Solving real problems with smart engineering
AI Workout Programming
Problem
Plans came from static templates that ignored goals, available equipment and experience level - the same programme handed to a beginner and to an advanced lifter.
Solution
AI Workout Programming - Personalized workout plans via GPT + custom plan engine - adapted to goals, equipment, and experience level.
Vision AI Photo Comparison
Problem
Physical change was invisible between weigh-ins, leaving users with no evidence that the work was doing anything.
Solution
Vision AI Photo Comparison - Past vs current vs ideal body comparison - visual feedback that motivates and guides progress.
AI-Generated Demo Videos
Problem
Exercise demonstrations were one generic clip per movement, pitched at no particular skill level.
Solution
AI-Generated Demo Videos - Workout video clips tailored to user experience level - generative video for true personalization.
Macro-Based Meal Planning
Problem
Nutrition targets were generic rather than calculated, so calorie and macro goals rarely matched the user in front of them.
Solution
Macro-Based Meal Planning - Custom meal plans with recipe generation - calorie and macro targets tuned to each user.
Progress Analytics
Problem
Plans were fixed at sign-up and never revised, so coaching stopped adapting the moment real progress diverged from the template.
Solution
Progress Analytics - Auto-recommendations based on weekly progress - coaching that evolves with the user.
A closer look at every screen
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Built with
Mobile App
- Flutter using Riverpod / Bloc for modular state management
- Cross-platform iOS, Android, and tablet support
Backend
- Node.js + Python for plan automation
- Modular AI components for scalable personalization
AI Models
- GPT-4o for plan generation and meal swaps
- TensorFlow.js + Roboflow for Vision AI body analysis
- Synthesia / RunwayML for AI-generated workout demo videos
Infrastructure
- Firebase + AWS for storage and hosting
- Stripe subscription billing for premium tiers
- Firebase Analytics + custom progress engine
What actually changed
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