Name: Flex AI: Your AI Personal Trainer
Rating: 5.0 (2 reviews)

Introducing AI form feedback and AI-powered training coach. Flex AI is the world’s first AI personal trainer. The new update (Flex 3.0) introduces real-time AI Form Feedback and Lex—an AI persona that adapts your workout plan, analyzes your lifts, corrects your form instantly, and answers questions about training, recovery, and nutrition.

The AI feedback feature was impressively accurate overall! I really liked how it broke down each part of the movement and explained everything in a clear, easy-to-understand way. It’s an awesome tool for checking your form when you’re unsure about proper exercise technique.

The only hiccup was that I was wearing a sweatshirt, which caused the AI to slightly misread a few angles.

AI personal trainer that learns about my fitness and helps me improve with auto progressive overload & on-demand workout generation
Form feedback with just my phone and a tripod
Better interface design

No. It works on 5 most popular and tricky exercises

Weight, rep, set types (for example, warmup or drop set), and overall volume

Yes. The workouts are also generated based on my goal, progress, and other preferences/conditions I provided to the AI trainer

The chat with Supportive Lex was very smooth, responses were fast and natural. I set a few goals based on my weight loss target, and it created a workout program with exercises automatically added, which was pretty cool. I also tested if it remembered my earlier inputs, and the diet recommendations it gave after I mentioned being lactose intolerant were great. I also asked how my data is being used & the response was pretty detailed.

Flex AI: Your AI Personal Trainer

Introducing AI form feedback and AI-powered training coach.

Introducing AI form feedback and AI-powered training coach.

Flex AI: Your AI Personal Trainer Reviews

The community submitted 2 reviews to tell us what they like about Flex AI: Your AI Personal Trainer, what Flex AI: Your AI Personal Trainer can do better, and more.

What's great

What needs improvement

vs Alternatives

Does form correction work on all major lifts and exercises?

What metrics from my lifts does Lex analyze?

Are recommendations evidence-based and sourced from research?

What's great

Does it integrate with Apple Health, Garmin, or Strava?