# FM vs AquaTesterPro

The clearest difference is iOS requirement: FM at 9.3 against AquaTesterPro's 11.2. 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.

FM ships an update every 4 months, AquaTesterPro every 3 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | FM | AquaTesterPro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 62 MB | 23 MB |
| Requires iOS | **9.3** | 11.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OASE GmbH](https://appshunter.io/developer/642838336) | [Velda B.V.](https://appshunter.io/developer/1495200429) |

## What reviewers say

### FM

[App page](https://appshunter.io/ios/app/fm-master-wlan/id967950429)

Control your garden's lighting, pumps, and other appliances remotely. This app allows you to manage multiple devices, set schedules, and monitor their status from anywhere in the world. Requires specific hardware to function.

**Highlights:** Control 3 switchable and 1 dimmable power outlet, Integrate up to 10 additional remote-controlled devices, Individually adjustable timer function for each outlet, Remote monitoring via OASE Cloud, Receive status reports via email

**Features:** macOS Compatibility

**In-app purchases:** none


### AquaTesterPro

[App page](https://appshunter.io/ios/app/aquatesterpro/id1495200430)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FM free?

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

### Is AquaTesterPro free?

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

### Do FM or AquaTesterPro have ads?

Neither FM nor AquaTesterPro shows ads.

### Which is updated more often, FM or AquaTesterPro?

FM ships an update every 4 months, and AquaTesterPro every 3 months. Most recently, FM was updated on October 6, 2026 and AquaTesterPro on October 4, 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.*