Fitto vs OSIN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fitto
Analyze your body's muscle composition with advanced technology and receive a personalized wellness program. Track key muscle metrics, get calorie recommendations, and access healthy recipes and workout plans.
- Accurate muscle group analysis with NIR technology
- Personalized '9 Block Therapy' wellness program
- Track Muscle Mass, Quality, and Grade
- Daily calorie intake recommendations
- Recipe and workout regimen content
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Don’t limit your challenges, challenge your limit. Only 5 spots of your body are needed to get to know about your body muscle composition. [What you get] • Accurate analysis of each muscle group with NIR technology*. • A Unique personalized wellness program called '9 Block Therapy' can help you to achieve your healthier life. • Track your muscle condition: Muscle Mass, Muscle Quality and Muscle Grade. • Recommendation for daily calorie intake* by integrating the Health Kit data. • Experience powerful contents: various recipes powered by FatSecret's and helpful workout regimens. It's time to Fitto Learn more * NIR technology: https://shop.olivehc.com/pages/near-infrared-nir-technology * Dietary guidelines for America: https://www.dietaryguidelines.gov -- This service is intended for general wellness awareness and management. Fitto is not a medical device and does not substitute clinical diagnosis. Consult with a healthcare professional if you need a medical diagnosis or prescription.
OSIN
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The OSIN App enables you to connect and synchronize your OSIN Loop ensuring you receive the right light at the right time no matter where you are.
Screenshots
Verdict
The clearest difference is update cadence: OSIN at every 3 weeks against Fitto's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fitto ships an update every 3 months, OSIN every 3 weeks. The most recent releases landed on June 9, 2026 and December 10, 2025 respectively.
| Parameter | Fitto | OSIN |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.2 — better | 14.0 |
| Further details — not scored | ||
| Size | 123 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Olive Healthcare Inc. | OSIN LIGHTING LIMITED |
In-app purchases
Fitto
No in-app purchases
OSIN
No in-app purchases
