# F vs Sonel MeasureEffect

The clearest difference is update cadence: Sonel MeasureEffect at monthly against F's every 7 months. F's advantage is device support (3 vs 1). On price, ads, in-app purchases 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.

F ships an update every 7 months, Sonel MeasureEffect monthly. The most recent releases landed on October 9, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | F | Sonel MeasureEffect |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Size | 34 MB | 169 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [FRAPOL Sp. z o.o.](https://appshunter.io/developer/1558995199) | [Sonel S.A.](https://appshunter.io/developer/1837118414) |

## What reviewers say

### F

[App page](https://appshunter.io/ios/app/f-tool/id6502821301)

**In-app purchases:** none


### Sonel MeasureEffect

[App page](https://appshunter.io/ios/app/sonel-measureeffect/id6751837211)

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

**In-app purchases:** none


## Frequently asked questions

### Is F free?

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

### Is Sonel MeasureEffect free?

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

### Do F or Sonel MeasureEffect have ads?

Neither F nor Sonel MeasureEffect shows ads.

### Which is updated more often, F or Sonel MeasureEffect?

F ships an update every 7 months, and Sonel MeasureEffect monthly. Most recently, F was updated on October 9, 2026 and Sonel MeasureEffect on October 19, 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.*