Personal AI fitness coach
An AI fitness coach that knows your week.
Rex connects your workouts, recovery, sleep, and nutrition into practical answers — from whether to train today to how to adjust the session in front of you.
Free to try · iPhone + Apple Watch
Answers that lead to a next move
Generic tips are easy. Useful coaching starts with what your week actually looked like.
Ask Rex why recovery is low, whether today should be hard or easy, or how to adjust a specific workout. It connects the dots across your recent training, sleep, recovery, and nutrition so the answer fits the moment instead of sounding like a canned article.
Rex can also help turn that answer into action: build a workout around how recovered you are, suggest a rest day when the signals point there, or explain what changed since yesterday in plain language.
Training decisions
Ask whether to push, hold back, swap a session, or take the rest day — and get a clear reason with the answer.
Workout help
Talk through a specific workout, exercise, or progression without leaving the training flow.
Recovery context
Understand why today feels different and what that means for the effort you planned.
Nutrition together
Connect food, hydration, and caffeine with the training and recovery picture instead of treating them as separate apps.
One coach across the whole training loop
Rex sits beside readiness, adaptive plans, workout logging, running, and meal logging. That shared context is what makes the conversation useful: the advice can reflect what you trained, how you recovered, and what you have planned next — then help you act on it in the same app.
Reps is a fitness and wellness aid, not a medical device. Rex does not diagnose conditions or replace professional medical advice.
Common questions
What can I ask Rex?
Ask about training, recovery, nutrition, or a specific workout — for example why recovery is low, whether to train legs today, or how to adjust a session.
Can Rex build a workout?
Yes. Rex can build a workout around your current recovery and make a rest-day call when backing off is the smarter move.
Does Rex work with the rest of Reps?
Yes. Rex is part of the same app as readiness, adaptive plans, workout logging, running, and nutrition, so advice can connect the whole training picture.
Is Rex medical advice?
No. Rex is fitness and wellness coaching support, not a medical device, and it does not diagnose conditions or replace professional medical advice.
Personal AI fitness coach
A coach that knows your week.
Ask Rex what today calls for and turn the answer into action. Free to try.
Free to download • Built for iPhone + Apple Watch