FormTwinThis is
your twin.
Every muscle, bone and organ in one living 3D model you can rotate and see through. Tap any muscle to know exactly how to train it — the real anatomy from the FormTwin app, right in your browser.
Free on the App Store →Every muscle,
mapped.
All 28 muscle groups — the exact geometry that ships inside the app. As you scroll, your twin revolves and travels down the body. Hover any muscle to name it; tap it to learn how to grow it.
See straight
through it.
Muscle, bone and organs, layered together. The muscle turns translucent so the skeleton that carries every rep — and the organs your training keeps strong — show through. Toggle any layer, tap an organ to see what it does.
Know exactly
how to train it.
Tap any muscle and your twin zooms in with the same coaching as the app — what it does, and the best exercises to hit it, with sets, reps and equipment. From your first push-up to a heavy pull.
Progress you can finally see.
A number on a scale doesn't tell the story. FormTwin turns every honest day — each workout, each meal, each streak — into a body you can hold in your hand and rotate in 3D. The muscles you trained light up. The work becomes visible.
Everything works toward one thing
Making it a little easier to show up tomorrow.
Build the streak
Consistency is the whole game. FormTwin turns showing up into a streak worth protecting, with gentle reminders exactly when you need them.
Plans that adapt
Pick a goal and your training days and FormTwin builds the plan — Full Body, Upper/Lower, Push-Pull-Legs or Bro. A rolling schedule moves today forward when life happens, so one missed day never breaks momentum.
Eat a little better
Log meals in seconds — an emoji food picker, a barcode scan, or an on-device photo of your plate. Goal-aware targets, zero calorie guilt.
See how far you've come
Weight, body-composition, progress photos and streaks in clean, glanceable charts — plus the 3D twin that reflects every session you log.
Earn your milestones
From your first workout to a 100-day streak, 18 milestone badges from Bronze to Elite make every bit of progress feel earned.
Private by design
No ads, no trackers, no servers mining your data. Everything lives on your device and your own private iCloud — synced across iPhone, iPad and Apple Watch.
Free to start. Pro when you're ready.
The core app is genuinely useful for free — go Pro for the deeper tools, with a 1-month trial and no gimmicks.
€0
Everything you need to start building the habit.
- Log workouts & meals
- Daily streaks & reminders
- The 3D body & muscle map
- Milestone badges & home-screen widget
Unlock everything
Body composition, on-device photo meal-AI, Apple Health sync and your full history.
- Body composition & insights
- On-device photo meal recognition
- Apple Health sync & full history
- Advanced progress lenses
1-month free trial · cancel anytime · billed by Apple