# Yefit vs FourScan

The clearest difference is update cadence: FourScan at every 5 days against Yefit's every 3 weeks. Yefit's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Yefit ships an update every 3 weeks, FourScan every 5 days. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Yefit | FourScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/yefit/id1274958172/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 141 MB | 3 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen TJD Information Technology Co. LTD](https://appshunter.io/developer/1237032542) | [satoshi amasaki](https://appshunter.io/developer/1891268722) |

## What reviewers say

### Yefit

[App page](https://appshunter.io/ios/app/yefit/id1274958172)

Monitor your smart wearable devices in real-time, tracking exercise, personal health data, and movement. Set health goals, receive personalized guidance, and control device functions like music and weather. Integrates with HealthKit for a comprehensive health profile.

**Highlights:** Real-time data monitoring, Personalized health management, Intelligent exercise guidance, Device control (music, weather), Sleep monitoring, HealthKit integration

**In-app purchases:** none


### FourScan

[App page](https://appshunter.io/ios/app/fourscan-spy-detector/id6761895107)

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

**In-app purchases:** none


## Frequently asked questions

### Is Yefit free?

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

### Is FourScan free?

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

### Do Yefit or FourScan have ads?

Neither Yefit nor FourScan shows ads.

### Which is updated more often, Yefit or FourScan?

Yefit ships an update every 3 weeks, and FourScan every 5 days. Most recently, Yefit was updated on November 3, 2026 and FourScan on October 29, 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.*