# BeltTune vs Filament

The clearest difference is price: Filament at Free against BeltTune's $4.99. Filament also leads on update cadence (fortnightly vs every 7 months) and device support (3 vs 1). BeltTune's advantage is iOS requirement (18.1 vs 26.0). On ads and in-app purchases there is nothing between them.

Filament 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, Filament fortnightly. The most recent releases landed on October 24, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | BeltTune | Filament |
| --- | --- | --- |
| 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 | **Fortnightly** |
| Monetization | Paid | — |
| Size | 4 MB | 25 MB |
| Requires iOS | **18.1** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Justin Oakes](https://appshunter.io/developer/981204152) | [David Oreol](https://appshunter.io/developer/1892872687) |

## 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


### Filament

[App page](https://appshunter.io/ios/app/filament-tracker/id6762094669)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BeltTune free?

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

### Is Filament free?

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

### Do BeltTune or Filament have ads?

Neither BeltTune nor Filament shows ads.

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

BeltTune ships an update every 7 months, and Filament fortnightly. Most recently, BeltTune was updated on October 24, 2026 and Filament on September 28, 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.*