AI Fitness Coach for Natural Muscle Growth
Your body. Your plan. Powered by AI.
Build muscle with a personalized workout plan that evolves with you. rep.ai combines AI body scan insights, workout tracking and nutrition guidance to help you know what to do next.
Built around your goals, experience, schedule and equipment.
Your next workout
Upper bodyWeek 1 · Day 1
Bench Press3 sets · 8–12 reps
Lat Pulldown3 sets · 8–12 reps
Shoulder Press3 sets · 8–12 reps
Bicep Curl3 sets · 10–15 reps
How it works
From AI body scan to personalized workout plan
rep.ai turns your starting point into a clear plan for building muscle. Answer a few questions, complete your body scan and let your AI fitness coach bring it together.
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Scan your body. Set your goals.
Complete a guided photo check-in and tell rep.ai about your training experience, goals and available equipment. Your scan provides visual insights that help personalize your plan.
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Get your AI-generated workout plan.
Get a muscle-building workout plan with exercises, sets and reps tailored to your schedule. Add calorie and protein targets to support your training.
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Track your workouts. Adapt your plan.
Log your weights and reps, update your body weight and check in regularly. rep.ai uses your progress to adjust training and nutrition recommendations over time.
Training
An AI workout planner built around you
Spend less time planning your workouts and more time training. rep.ai creates a personalized strength training plan based on your goals, experience and equipment.
Your plan shows you:
- Which exercises to do.
- How many sets and reps to aim for.
- Suggested weights for your next workout.
- Your previous performance to help you track progress.
Whether you’re starting your first gym routine or following an established training schedule, your next workout has a clear purpose.
Your AI training plan
Build muscle · Intermediate
- Bench press3 sets · 8–10 reps
- Lat pulldown3 sets · 10–12 reps
- Seated cable row3 sets · 10–12 reps
Body scan & progress
Track visible changes with AI body scan insights
See how your physique changes over time with regular photo check-ins. rep.ai combines visual insights with your workout history and weight trends to help guide your plan.
Track more than the number on the scale. Review your consistency, strength progress and visible development together.
Body scan insights are estimates. Photos cannot precisely measure body composition or determine your genetic muscle-building limit.
Nutrition
Personalized nutrition targets for muscle growth
Support your training with daily calorie and protein targets tailored to your goal. Get simple meal suggestions and guidance that adjusts as your weight trend changes.
Whether you want to build muscle, lose fat or work toward body recomposition, rep.ai helps connect your nutrition habits with your training plan.
Less guesswork about what to eat. More clarity about your daily targets.
Nutrition
Ideas that fit your day and your goal.
Today’s targets
Recovery
Make recovery part of your training plan
Your workouts are only part of the picture. Check in on your sleep and energy to give your AI fitness coach more context.
rep.ai uses your updates to help tailor its training and recovery guidance, so your plan reflects how you’re progressing and feeling.
Coach note Energy is up after a consistent bedtime. Today’s session stays on plan.
rep.ai at a glance
Your AI fitness coach in one app
- What it is
- An AI fitness coaching app for natural muscle growth.
- Who it’s for
- Strength training beginners and experienced lifters who want to build muscle, lose fat or work toward body recomposition.
- What you get
- A personalized workout plan with exercises, sets, reps and suggested weights, plus daily calorie and protein targets.
- How it adapts
- Your logged weights, reps, body weight, check-ins, sleep and energy shape future recommendations.
- Where you train
- At the gym or at home — the plan follows the equipment you have available.
- Availability
- Coming to iOS and Android. Join the early-access list for launch updates.
- Privacy
- App data is stored in the EU (Frankfurt). Health data is processed only with your explicit consent.
- Made by
- yeeylo UG (haftungsbeschränkt), an independent company based in Rostock, Germany.
Questions about AI fitness coaching and rep.ai
What is rep.ai?
rep.ai is an AI fitness coaching app for natural muscle growth. It creates personalized workout plans and combines body scan insights, workout tracking, nutrition targets and recovery check-ins in one place.
How does rep.ai create a personalized workout plan?
rep.ai uses your goals, training experience, schedule, available equipment and body scan insights to create your workout plan. The plan includes exercises, sets and reps, with recommendations that can adapt as you log your progress.
How does the AI body scan work?
The AI body scan uses photos taken with guided in-app instructions to provide visual physique insights. rep.ai considers these insights alongside your goals and training information to help personalize your plan and track visible changes.
Scan insights are estimates, not precise body-composition measurements or medical assessments.
Can an AI body scan calculate my natural muscle potential?
An AI body scan cannot determine your exact genetic muscle-building limit. rep.ai focuses on tracking visible development, training performance and progress over time to help you make more informed decisions.
Is rep.ai a good starting point for strength training beginners?
rep.ai is designed to support beginners with a structured workout plan based on their experience and available equipment. You receive exercises, sets and reps without needing to create a routine from scratch.
Does my AI workout plan change as I get stronger?
Yes. rep.ai uses your logged weights, reps and check-ins to adjust workout recommendations as you progress. Consistent tracking gives your AI coach more information to help guide future workouts.
Can I use rep.ai for home workouts?
rep.ai tailors your workout plan to the equipment you tell it you have available. You can use it to plan training at a gym or at home, depending on your setup.
Does rep.ai provide nutrition guidance for building muscle?
Yes. rep.ai provides calorie and protein targets, simple meal suggestions and adjustments based on your goals and weight trend. This helps you align your nutrition with your muscle-building workout plan.
Can rep.ai help with fat loss or body recomposition?
rep.ai can tailor training and nutrition recommendations to muscle gain, fat loss or body recomposition goals. Your experience, consistency and individual response will influence your progress.
What do I need to track?
Log your workout weights and reps, update your body weight and complete regular progress check-ins. Sleep and energy updates provide additional context for your coach’s recommendations.
Can AI create a personalized workout plan for me?
Yes. An AI fitness coach like rep.ai creates a personalized workout plan from your goals, training experience, schedule and available equipment. rep.ai builds a muscle-building plan with exercises, sets, reps and suggested weights, and adjusts it as you log your workouts.
How can I automate my training plan?
With rep.ai, you don’t need to plan workouts or progressions yourself. After a short onboarding and an optional body scan, rep.ai generates your plan, shows you what to do in each session and uses your logged weights, reps and check-ins to adapt future workouts and nutrition targets automatically.
Can an AI create a nutrition plan for building muscle?
rep.ai calculates daily calorie and protein targets for your goal and suggests simple meals that fit them. As your weight trend changes, the targets adjust. rep.ai provides general nutrition guidance, not a medical diet; people with medical conditions or special dietary needs should consult a doctor or registered dietitian.
How is rep.ai different from asking a general AI chatbot for a workout plan?
A general chatbot can write a one-off plan, but it does not track your training over time. rep.ai keeps your workout history, body weight, body scan check-ins, sleep and energy in one place and uses that data to adjust your plan session by session, with suggested weights based on your previous performance.
Where is my data stored and is it private?
rep.ai is a project of yeeylo UG (haftungsbeschränkt), a company based in Rostock, Germany. App data is stored in the EU (Frankfurt, Germany). Health data such as body scan photos and weight is only processed with your explicit consent, and you can delete scans or your entire account at any time. Read the Privacy Policy for details.
How do I get early access to rep.ai?
Join the rep.ai early-access list to receive launch updates and find out when the app becomes available.