Your body creates signals every day
Training, sleep, stress, and movement already generate useful data. Forjum starts from that reality.
Five stats from HRV, sleep, and training on your phone and smartwatch. Your character grows only when your body does.
One flow: your body signals, adaptive decisions, short sessions, and real stat progression.
HRV, sleep, VO2Max, workouts, and more — mapped to RPG stats that reflect your actual fitness state.
Raw physical power and impact — strength training, load, and neuromuscular force.
Speed, reactivity, and precise motor control.
Cardiorespiratory endurance and fatigue resistance — VO2Max, cardio load, stamina.
Recovery, autonomic balance, and stress resilience — sleep and HRV-driven readiness.
Social influence, engagement, and opportunities — connection, events, and shared activity.
Every minigame runs on your watch and is verified by its sensors in real time. Balance poses tracked by the accelerometer. Breathing rhythm measured by heart rate. No self-reporting.
Duel friends or co-op with others on shared minigame challenges. Only names and scores are ever shared online. Your health data never leaves your device. Multiplayer accounts are optional.
Only names + scores shared online · Health data stays on device · Account optional
Three steps from watch data to character progression — all on your device.
Get Forjum on App Store or Google Play. Free download — premium is optional.
iPhone · Android · Apple Watch · Wear OS
Forjum reads from HealthKit or Wear OS Health Services. Your health data isn't uploaded to any server — it's read and processed on your device. Setup takes 30 seconds.
Apple Watch Series 4+ · Galaxy Watch 4+ · Pixel Watch
14+ biometric signals feed your five stats each day. Play minigames, train, or recover — progress reflects what your body actually did.
Might · Agility · Vitality · Spirit · Presence
Most fitness apps engineer dependency — streaks, daily notifications, guilt mechanics. Forjum does the opposite. After roughly a year of use, you should be able to interpret your body's signals without the app.
We consider it a success if you graduate. The character grows, you grow, and eventually you trust your own biometrics without needing a dashboard to tell you.
No streaks, no guilt, no penalty for a missed day. But your stats aren't a score you only climb — they mirror your body. Consistent training builds them; extended inactivity lets them fade, exactly as real fitness does. That's the point: they reflect reality, not attendance.
Each morning, the app reads your signals and suggests whether to push hard, go easy, or rest. No fixed schedule.
Stats only rise when your physiology actually improves. There is no reward for opening the app.
Your health signals are processed entirely on your device. Your biometric data is never transmitted to our servers.
All health signals are processed on-device using HealthKit and Wear OS Health Services. Your biometric data is never transmitted to our servers. Forjum contains no ad network and no advertising or tracking SDKs. For app stability and optional online multiplayer we use Firebase (anonymized crash, usage and game-score data only) — see our Privacy Policy.
You can verify this independently via the App Store and Google Play privacy nutrition labels.
All biometric computation happens locally on your device. Your health data is never synced to the cloud.
Single-player mode works entirely offline. Forever.
Free download. Premium optional. No subscription traps, no in-app ad networks.
If you choose to connect online, only your chosen username and game scores leave the device.
Free to download. Premium optional. Requires Apple Watch Series 4+ or a compatible Wear OS device.
Zero ads · No streak guilt · Health data never leaves your device
Free download · Premium optional