# Derax vs FMN Tester

Derax and FMN Tester are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Derax ships an update every 9 days, FMN Tester every 8 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Derax | FMN Tester |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 8 days** |
| Size | 44 MB | 10 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Deeray GLobal Co.,Limited](https://appshunter.io/developer/1887731436) | [Beijing Zizai Technology Co.,Ltd.](https://appshunter.io/developer/736738603) |

## What reviewers say

### Derax

[App page](https://appshunter.io/ios/app/derax/id6761087271)

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

**In-app purchases:** none


### FMN Tester

[App page](https://appshunter.io/ios/app/fmn-tester/id6761606594)

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

**In-app purchases:** none


## Frequently asked questions

### Is Derax free?

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

### Is FMN Tester free?

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

### Do Derax or FMN Tester have ads?

Neither Derax nor FMN Tester shows ads.

### Which is updated more often, Derax or FMN Tester?

Derax ships an update every 9 days, and FMN Tester every 8 days. Most recently, Derax was updated on November 5, 2026 and FMN Tester on October 31, 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.*