AI fitness coach
The coach that actually remembers you.
Scan your physique and see exactly where you stand. Then train with a coach that learns your body, your schedule, and your goals — and adapts every plan, every set. Talk to it mid-workout. Get a real answer in two seconds.
Physique Score
One full-body photo. Ten scores — muscularity, leanness, symmetry, and more — charted over time so you can watch them climb.
Persistent memory
Tell it once about your knee, your home gym, your travel weeks. It remembers — and you can see exactly what's stored.
Plans that adapt
Skipped legs three weeks in a row? It rebalances. PR'd your bench? It updates the next session's load.
Talk while you train
"Swap incline press, bench is taken" — the coach edits your live workout on the spot. Never done a lift? Ask what weight to start with and get a real number.
Works offline
Basement gym, no bars? Start, log, and finish workouts offline — everything syncs when you're back.
Stats that mean something
Volume trends per body part. PR cadence — with a proper celebration when you set one. Real numbers, not vanity dashboards.
Know exactly where your physique stands.
Take one full-body photo and get your Physique Score — an overall rating out of 10, an estimated body fat percentage, and a breakdown across the dimensions that actually shape how you look. Re-scan as you train and watch every line trend up.
Estimates from a single photo — approximate, not medical advice. Your scan photos are yours; delete them anytime.
How Forj compares.
Strong and Hevy are great loggers. They don't coach. Forj is the AI layer your training log was always missing.
| What you get | Forj | Strong | Hevy |
|---|---|---|---|
| Workout tracking | ✓ | ✓ | ✓ |
| AI coach you can talk to | ✓ | — | — |
| Physique score from a photo | ✓ | — | — |
| Plans that adapt to your history | ✓ | — (rigid templates) | — (rigid templates) |
| Persistent memory across sessions | ✓ | — | — |
| Voice input mid-set | ✓ | — | — |
| Volume + PR analytics | ✓ | ✓ | ✓ |
| Social feed / followers | — (focused, not social) | — | ✓ |
| Price | $9.99/mo · $59.99/yr | $4.99/mo | Free + $7.99/mo pro |
Strong and Hevy comparisons reflect their public feature pages as of July 2026.
Built for lifters, not feature lists.
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. If you train 3+ days a week and care about progressive overload, this is for you.
$9.99/month or $59.99/year
Cancel anytime from your Apple ID settings.
Download Forj →