# S2S Functional Performance vs SmartCuffs

The clearest difference is rating: S2S Functional Performance at 5.0 against SmartCuffs's 2.4. SmartCuffs's advantage is ads (none vs shown) and update cadence (monthly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

S2S Functional Performance holds the better App Store score, 5.0 against 2.4. That said, the two scores are not equally well evidenced: SmartCuffs has 36 ratings behind it against 4, so its average is the more settled of the two.

S2S Functional Performance ships an update every 2 months, SmartCuffs monthly. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | S2S Functional Performance | SmartCuffs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/s2s-functional-performance/id1031344590/reviews)** | [2.4 (36 ratings)](https://appshunter.io/ios/app/smartcuffs/id1632227731/reviews) |
| Number of ratings | 4 | **36** |
| Positive reviews | — | 20.8% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 119 MB | 37 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Meredith S. Tittle, P.T., P.C.](https://appshunter.io/developer/1462694216) | [Smart Tools Plus, LLC](https://appshunter.io/developer/1520284709) |

## What reviewers say

### S2S Functional Performance

[App page](https://appshunter.io/ios/app/s2s-functional-performance/id1031344590)

This app helps users manage their physical therapy appointments, specialized training sessions, and rewards program. Connect with the S2S community, access exclusive insider tips, and optimize your health and fitness journey.

**Highlights:** Client account management, Physical therapy scheduling, S2S Rewards program, Social media integration, Exclusive rewards and tips, Specialized training access

**Features:** macOS Compatibility, Apple Wallet

**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 S2S Functional Performance free?

S2S Functional Performance 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, S2S Functional Performance or SmartCuffs?

S2S Functional Performance is rated higher. S2S Functional Performance averages 5.0 out of 5 from 4 ratings, while SmartCuffs averages 2.4 from 36 ratings.

### Do S2S Functional Performance or SmartCuffs have ads?

S2S Functional Performance shows ads; SmartCuffs does not.

### Which is updated more often, S2S Functional Performance or SmartCuffs?

S2S Functional Performance ships an update every 2 months, and SmartCuffs monthly. Most recently, S2S Functional Performance was updated on October 1, 2026 and SmartCuffs on October 9, 2026.

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