Streaks, levels, badges, and a daily habit — but instead of vocabulary, you're building real strength. No gym. No equipment. Just 10–20 minutes a day.
Start training freeFree to start · No credit card · Works on any phone
The Duolingo formula — applied to your fitness.
Duolingo
Miss a day, break the chain
fitn3s
Miss a day, break the chain
Same mechanic — the daily habit is the whole point.
Duolingo
XP and league ranks
fitn3s
Level 1–40 fitness scale (push-ups, wall sit, squats)
fitn3s levels are grounded in real strength benchmarks.
Duolingo
Achievement badges for milestones
fitn3s
20+ badge types: streaks, locations, body-part milestones, time-of-day
Including per-exercise bronze → platinum milestone badges.
Duolingo
5–15 minute lessons
fitn3s
10–20 minute personalised workouts
Long enough to matter. Short enough to actually do.
Duolingo
Lessons get harder as you improve
fitn3s
Rep targets automatically increase after 3 consecutive wins
Science-based progressive overload — not just harder for harder's sake.
Duolingo
Adapts to your pace and weak points
fitn3s
Adapts to your fitness level, goals, and sore days
Body part focus, flexibility recovery days, and difficulty gating.
Beyond the habit loop — the things that make training actually work.
Bodyweight only — no gym needed
Every exercise uses your own body. No equipment, no membership, no commute. Your living room is the gym.
Science-backed, not gamified fluff
Progressive overload, compound movements, and a 40-level system built from real fitness benchmarks. The streaks feel good because the training works.
Body Fitness Profile
See how each muscle group is developing — chest, back, shoulders, core, legs, and more — updated after every workout.
No subscription, no paywalls
Right now every feature is free — no locked workouts, no badge packs to buy.
Three steps. Daily. That's it.
Take a quick fitness test
Push-ups, wall sit, squats. Takes 3 minutes. Places you on the 1–40 scale so your workouts start at exactly the right level.
Get your personalised daily workout
10–20 minutes, all bodyweight. Targets your goals and body parts. Gets harder as you improve.
Build the streak
Every completed workout adds to your streak. Miss one? A shield power-up lets you restore it. The habit compounds.
“Duolingo got me learning Spanish.
fitn3s got me doing push-ups.”
The same psychology. A different skill.
Sign in with Google, take a 3-minute fitness test, and get your first personalised workout today.
Start training freeAlready training? Log in →