StayFit.
N3D LLC Health & Fitness iPhoneiPadiPod touch
StayFit. is a free Health & Fitness app for iPhone and iPad by N3D LLC. Rated 5.0/5 from 8 ratings. Requires iOS 18.0. Updated September 28, 2026.
- Rating
- 5.0
- 8 ratings
- Price
- Free
- on the App Store
- Size
- 9 MB
- Age 4+
- Updated
- Sep 28
- 2026 · v1.3
Screenshots
About StayFit.
See every muscle you train. StayFit turns your workouts into something you can actually see. An interactive 3D body map lights up each muscle by how hard you've worked it — so you always know what you're hitting, and what you're neglecting. FEATURES • Interactive 3D muscle map that shades muscles by training effort, in real time • Build custom workout splits — push/pull/legs, upper/lower, or your own routine • Log sets, reps, and weight in seconds — plus cardio (run, bike, row, and more) • Per-muscle recovery tracking so you know when each muscle is ready again • Progress charts for volume, workouts, bodyweight, and cardio • Apple Health sync for steps, active energy, and weight • Works fully offline — no account needed, your data stays on your device WHY STAYFIT Most fitness apps are just lists of exercises. StayFit is visual. Watching your body respond to your training keeps you consistent and balanced — and makes it obvious when a muscle group is falling behind. Whether it's your first week in the gym or your tenth year, StayFit gives you a clearer, smarter way to train. STAYFIT PREMIUM Unlock advanced features with StayFit Premium — a monthly or annual subscription with a free trial. Payment is charged to your Apple ID at purchase confirmation. Subscriptions auto-renew unless canceled at least 24 hours before the period ends; manage or cancel anytime in your App Store settings. Privacy Policy: https://stayfit.dev/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & reviews
5.0
8 ratings
What’s new
Version 1.3 · Updated September 28, 2026
New in this update: • New Premium training splits: 5x5 Strength, 6-day Push/Pull/Legs, 6-day Upper/Lower, Arm Specialization, Dumbbell Only, and Glute Focus. • New cardio activities: Yoga, Pilates, Reformer Pilates, Barre, Dance, and Boxing. • A clearer, single calories view on your Body page. • Reliability and polish improvements.
App privacy
The developer, N3D LLC, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to StayFit.
Looking for apps like StayFit.? Here are 6 similar apps on the App Store. The highest rated is Via Fortis: Muscle Heat Map (5.0/5), and all 6 are free to download.
-
Foldd: Quit Gambling Blocker
-
Tinnitus Relief: EarCalm
-
BodyWHAT - AI Body-fat scanner
4.0
-
Via Fortis: Muscle Heat Map
5.0
-
Stay Fit: Workout Tracker
-
Pranayama Calm: Box Breathing
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| StayFit. | 5.0 / 5 (8 ratings) | Free | September 28, 2026 | |
| Foldd: Quit Gambling Blocker | – | Free | Oct 18, 2026 | Compare |
| Tinnitus Relief: EarCalm | – | Free | Aug 24, 2026 | Compare |
| BodyWHAT - AI Body-fat scanner | 4.0 / 5 (1) | Free | Sep 27, 2026 | Compare |
| Via Fortis: Muscle Heat Map | 5.0 / 5 (3) | Free | Sep 24, 2026 | Compare |
| Stay Fit: Workout Tracker | – | Free | Feb 16, 2026 | Compare |
| Pranayama Calm: Box Breathing | – | Free | Jul 29, 2026 | Compare |
Compare StayFit. with the top alternatives: ratings, updates, ASO score and keyword gaps →