# PrO2 Fit vs SmartCuffs

The clearest difference is rating: PrO2 Fit at 3.3 against SmartCuffs's 2.4. PrO2 Fit also leads on iOS requirement (12.0 vs 15.1). SmartCuffs's advantage is review sentiment (21% vs 0%) and ratings volume (36 vs 6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PrO2 Fit holds the better App Store score, 3.3 against 2.4. That said, the two scores are not equally well evidenced: SmartCuffs has 36 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 0% of PrO2 Fit's written reviews are positive against 21% of SmartCuffs's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | PrO2 Fit | SmartCuffs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (6 ratings)](https://appshunter.io/ios/app/pro2-fit/id1321623265/reviews)** | [2.4 (36 ratings)](https://appshunter.io/ios/app/smartcuffs/id1632227731/reviews) |
| Number of ratings | 6 | **36** |
| Positive reviews | 0.0% of reviews | **20.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | Free |
| Size | 25 MB | 37 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [PrO2HEALTH](https://appshunter.io/developer/909203686) | [Smart Tools Plus, LLC](https://appshunter.io/developer/1520284709) |

## What reviewers say

### PrO2 Fit

[App page](https://appshunter.io/ios/app/pro2-fit/id1321623265)

This app pairs with a respiratory muscle trainer to help users measure and improve their breathing strength and performance. It guides users through resisted breathing exercises to enhance respiratory function.

**Highlights:** Measure respiratory strength, Improve breathing performance, Resisted breathing exercises, Companion device integration, Track respiratory progress

**Features:** macOS Compatibility

**In-app purchases:** none


### SmartCuffs

[App page](https://appshunter.io/ios/app/smartcuffs/id1632227731)

This app pairs with specialized cuffs to enable Blood Flow Restriction (BFR) training. BFR uses low-intensity exercise with reduced arterial flow to achieve results similar to high-intensity training, allowing for muscle growth and strength gains with lighter loads.

**Highlights:** Connects to SmartCuffs 4.0 devices, Enables Blood Flow Restriction (BFR) training, Supports low-intensity exercise, Utilizes TriPressure technology, Offers continuous BFR, Offers intermittent BFR, Offers resting BFR

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PrO2 Fit free?

PrO2 Fit is free to download, with no in-app purchases.

### Is SmartCuffs free?

SmartCuffs is free to download, with no in-app purchases.

### Which has better reviews, PrO2 Fit or SmartCuffs?

PrO2 Fit is rated higher. PrO2 Fit averages 3.3 out of 5 from 6 ratings, while SmartCuffs averages 2.4 from 36 ratings.

### Do PrO2 Fit or SmartCuffs have ads?

Neither PrO2 Fit nor SmartCuffs shows ads.

### Which is updated more often, PrO2 Fit or SmartCuffs?

PrO2 Fit ships an update monthly, and SmartCuffs monthly. Most recently, PrO2 Fit was updated on October 24, 2026 and SmartCuffs on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*