# fx12 vs Thermal Sniffer

The clearest difference is update cadence: Thermal Sniffer at every 6 days against fx12's every 2 months. fx12's advantage is iOS requirement (9.3 vs 17.0). 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.

fx12 ships an update every 2 months, Thermal Sniffer every 6 days. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | fx12 | Thermal Sniffer |
| --- | --- | --- |
| 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 | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 38 MB | 2 MB |
| Requires iOS | **9.3** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Favionics](https://appshunter.io/developer/495997736) | [i-developer IT Beratung UG (haftungsbeschränkt)](https://appshunter.io/developer/366217872) |

## 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


### Thermal Sniffer

[App page](https://appshunter.io/ios/app/thermal-sniffer/id6476042130)

**In-app purchases:** none


## Frequently asked questions

### Is fx12 free?

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

### Is Thermal Sniffer free?

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

### Do fx12 or Thermal Sniffer have ads?

Neither fx12 nor Thermal Sniffer shows ads.

### Which is updated more often, fx12 or Thermal Sniffer?

fx12 ships an update every 2 months, and Thermal Sniffer every 6 days. Most recently, fx12 was updated on October 21, 2026 and Thermal Sniffer on October 25, 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.*