# BeltTune vs M

The clearest difference is price: M at Free against BeltTune's $4.99. M also leads on update cadence (every 3 months vs every 7 months) and iOS requirement (16.0 vs 18.1). On ads, in-app purchases and device support there is nothing between them.

M is free to download; BeltTune costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BeltTune ships an update every 7 months, M every 3 months. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | BeltTune | M |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/belttune/id6739983384/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 4 MB | 1 MB |
| Requires iOS | 18.1 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Justin Oakes](https://appshunter.io/developer/981204152) | [M-JET FLASHER GmbH](https://appshunter.io/developer/1868671631) |

## What reviewers say

### BeltTune

[App page](https://appshunter.io/ios/app/belttune/id6739983384)

This utility app uses your phone's microphone to measure belt tension by analyzing audio frequencies. It provides instant measurements, supports multiple belt segments, and averages results for accuracy. Ideal for professionals and enthusiasts needing precise belt installations.

**Highlights:** Instant frequency measurement, Real-time audio analysis, Multiple belt segment support, Automatic frequency averaging, Intuitive workshop interface, No external hardware needed

**In-app purchases:** none


### M

[App page](https://appshunter.io/ios/app/m-jet-module/id6757938177)

**In-app purchases:** none


## Frequently asked questions

### Is BeltTune free?

BeltTune costs $4.99, with no in-app purchases.

### Is M free?

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

### Do BeltTune or M have ads?

Neither BeltTune nor M shows ads.

### Which is updated more often, BeltTune or M?

BeltTune ships an update every 7 months, and M every 3 months. Most recently, BeltTune was updated on October 14, 2026 and M 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.*