# fx12 vs EarMaster

The clearest difference is ads: fx12 at none against EarMaster's shown. fx12 also leads on device support (3 vs 1) and iOS requirement (9.3 vs 17). EarMaster's advantage is update cadence (every 2 days vs every 2 months). On price 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.

fx12 ships an update every 2 months, EarMaster every 2 days. The most recent releases landed on October 4, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | fx12 | EarMaster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fx12/id1089760330/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 38 MB | 12 MB |
| Requires iOS | **9.3** | 17 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Favionics](https://appshunter.io/developer/495997736) | [CHUN-MING LIN](https://appshunter.io/developer/1831637603) |

## What reviewers say

### fx12

[App page](https://appshunter.io/ios/app/fx12/id1089760330)

This utility app connects to specific hardware devices, allowing real-time viewing and modification of parameters like altimeter and GPS data. An optional smartwatch app extends functionality to display telemetry and control models remotely. Be aware that background location usage may impact battery life.

**Highlights:** View and change device parameters, Real-time altimeter data, Real-time GPS data, Optional Apple Watch app, Remote model control

**Features:** macOS Compatibility

**In-app purchases:** none


### EarMaster

[App page](https://appshunter.io/ios/app/earmaster/id6749874856)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is fx12 free?

fx12 is free to download, with no in-app purchases.

### Is EarMaster free?

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

### Do fx12 or EarMaster have ads?

EarMaster shows ads; fx12 does not.

### Which is updated more often, fx12 or EarMaster?

fx12 ships an update every 2 months, and EarMaster every 2 days. Most recently, fx12 was updated on October 4, 2026 and EarMaster on September 24, 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.*