4.6
2,385 ratings
★★★★★
April 9, 2026
December 14, 2021
What's New
v3.1• New design: Flex now has a revamped interface with a modern look and improved usability. • Smarter AI trainer: Lex now creates and progresses your workouts with even more precision and intelligence. • Performance improvements and bug fixes.
App Info
- Developer
- Flex Artificial Intelligence Inc.
- Category
- Health & Fitness
- Price
- FREE
- Version
- 3.1
- App ID
- 1446354547
Description
Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form. Whether you’re chasing size, strength, or consistency, Flex uses real-time AI to guide every rep, adjust your program, and keep you motivated through challenges, leaderboards, and streaks. - Your AI Coach, Every Rep Personalized workouts built automatically by AI personas that learn your goals, history, and preferences. Real-time form feedback powered by patented computer-vision AI — get instant corrections on squats, bench, deadlift, rows, and more. Adaptive progression and deloading backed by sports-science principles — no spreadsheets, no guesswork. - Train Smarter — See Results AI tracks your strength curve and increases weight when you’re ready. Visual progress graphs show PRs, volume, and recovery trends. Track sets, reps, and tempo with a tap — or automatically with Apple Watch. - Stay Motivated & Connected Join a global community of lifters. Compete on leaderboards, build streaks, and earn badges. Post progress photos, celebrate milestones, and share results. - Accessible to Everyone Free to start with all core features included. Upgrade anytime for advanced AI coaching and premium analytics. Designed for all experience levels — from beginners to pros. - Why Flex AI Real-time AI form feedback (patented) Adaptive, science-based programming Progress tracking & recovery insights Gamified streaks + leaderboards Apple Watch integration Built for hypertrophy & strength goals Start Training Smarter — Today Download Flex AI and experience personal training powered by real AI. Perfect your form. Unlock your best lift. Train smarter — free on iPhone + Apple Watch.
Download Estimate
Estimated Total Downloads
3K
Low / mo
4K
Est / mo
6K
High / mo
Estimated using rating count ÷ genre rating rate. Actual downloads may vary ±50%. Same methodology used by Sensor Tower & data.ai.
Competitor Analysis
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Download figures are estimates · Updated every 6 hours