Stay Fit vs Crescendo 4×4
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Stay Fit compared with Crescendo 4×4
| Detail | 
Stay Fit | 
Crescendo 4×4 |
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| What it does | Free workout app with no subscription, no paywall, no trial that turns into a bill
| Norwegian HIIT starting at 30 seconds, scaling to the full 4×4 protocol
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| Stage | Not given
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| Founded | Not given
| Not given
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| Based in | Not given
| PL
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| Pricing model | Free
| Free
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| Pricing | Free to download and use. No subscription, no in-app purchases, no trial periods.
| Not given
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| Key features | - Guided workout flow from start to finish
- Sets, reps, and weight logging during training
- Custom workout routines
- Progress reports with charts and streaks
- Body weight and measurement tracking
- Progress photos stored on device
- Fitness goals and progress tracking
- JSON and CSV backup export
- Offline-first operation with no account required
- Multiple color themes including dark and AMOLED modes
| - Progressive on-ramp starting at 30-second intervals
- Voice-guided coaching throughout entire session
- Lock Screen and Dynamic Island display (iOS 17+)
- Works with screen locked and music playing
- Available in four languages
- Personalized heart-rate zones computed from max heart rate
- Native Apple Watch Workout app integration
- Adaptive level progression based on recovery data
- No account, no ads, no tracking
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| What makes it different | - Completely free with no subscription, no paywall, no trial periods, and no in-app purchases
- Offline-first design keeps all your data on your device by default
- All essential features included from day one with no features locked behind upgrades
- Private by default with user control over data and backups
- No account required for core fitness tracking functionality
| - Structured progressive on-ramp that no other 4×4 resource offers
- Never forced progression: holds levels based on recovery data and never uses shame mechanics
- Privacy by design with no account or tracking required
- Works completely with screen locked and music playing through voice cues
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 13 | 15 |
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| Referring domains (Majestic) | 15 | 5 |
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4 details filled in for both companies.
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