Forj: AI Gym Coach & Tracker
Physique Scan & Workout Log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Forj is the AI fitness coach that actually remembers you.
Most fitness apps are silent libraries — you log a workout, the app says "great job," and forgets you exist until the next session. Forj is the opposite. Scan your physique to see where you stand, then get a coach that learns what works for your body, your schedule, and your goals — and adjusts every session like it reads your training log every morning.
WHAT MAKES IT DIFFERENT
• See where you're starting. Scan your physique in seconds for a body-composition read, then watch it change as you train — progress you can actually see, not just numbers on a bar.
• A coach with persistent memory. Tell it once that your left knee acts up on heavy squats, and it'll factor that into every plan, every set, every recommendation — forever. You can see exactly what it remembers, and delete anything you don't want.
• Plans that adapt to what actually happened. Skipped legs three weeks in a row? It rebalances. PR'd your bench by 5kg? It updates the next session's load. No more rigid 8-week programs that ignore reality.
• Talk to it while you train. Tap the chat bubble mid-workout: "swap incline DB press, bench is taken" or "should I push for one more rep?" — get a useful answer in two seconds.
• Track everything that matters. Workouts, sets, reps, weights, supersets, body measurements, personal records — all in a clean dark interface that doesn't try to be a social network you didn't ask for.
• Stats that tell you something. Volume trends per body part. Time-since-last-hit. PR cadence. Streak protection. Real numbers, not vanity dashboards.
• Voice input. Press and hold the mic, talk to your coach hands-free between sets. No typing while your forearms are pumped.
WHO IT'S FOR
Lifters and gym-goers who want an opinionated, personalized program — not a feature list. People who train 3+ days a week and care about progressive overload. Beginners welcome; advanced users get the depth.
WHO IT'S NOT FOR
If you want endless video libraries, scrollable social feeds, or step-counting — there are great apps for that. This one is laser-focused on the lift.
HONEST AI USE
The AI coach is a tool, not a doctor. It uses Anthropic's Claude models routed through OpenRouter; your training data is processed to generate recommendations and is never sold. See the in-app memory screen for full transparency on what's stored, and delete anything (or your whole account) with one tap.
SUBSCRIPTION
$9.99/month, or $59.99/year (save 50%). No free trial. Cancel anytime from your Apple ID settings — your data stays accessible during the cancellation period and is erased completely if you delete your account.
Built in Brooklyn by Mott House LLC.
Privacy policy: https://api.forj.motthouse.com/legal/privacy
Terms: https://api.forj.motthouse.com/legal/terms
Support: support@motthouse.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Offline workouts — log, finish, and sync sessions with no signal.
Nothing's lost, even if the app closes mid-set.
• Automatic personal-record tracking with a celebration when you hit one.
• Smarter, gym-realistic weights in your plans.
• Update your profile and units right inside coach chat.
• Crash fixes and stability improvements.
The developer, Mott House LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mott House LLC
- Size
- 50.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Forj Pro (Monthly) $9.99
- Forj Pro (Annual) $59.99
- Copyright
- © 2026 Mott House LLC