# BeltTune vs FilamentFlow

The clearest difference is price: FilamentFlow at Free against BeltTune's $4.99. FilamentFlow also leads on device support (3 vs 1). BeltTune's advantage is rating (3.5 vs 2.0). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

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

BeltTune holds the better App Store score, 3.5 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

BeltTune ships an update every 7 months, FilamentFlow every 8 months. The most recent releases landed on November 12, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | BeltTune | FilamentFlow |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/belttune/id6739983384/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/filamentflow/id6741721528/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 8 months |
| Monetization | Paid | **Free** |
| Size | 4 MB | 1 MB |
| Requires iOS | 18.1 | **17.0** |
| Devices | iPhone | **iPhone, iPad, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Justin Oakes](https://appshunter.io/developer/981204152) | [文志 胡](https://appshunter.io/developer/976495345) |

## 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


### FilamentFlow

[App page](https://appshunter.io/ios/app/filamentflow/id6741721528)

Manage your 3D printing filament inventory with detailed tracking of brand, material, color, and quantity. Monitor usage trends with insightful charts and records. No account is required to get started.

**Highlights:** Filament inventory management, Track brand, material, color, and quantity, Quick add/consume functionality, Filter and sort by various criteria, Usage records and trend charts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BeltTune free?

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

### Is FilamentFlow free?

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

### Which has better reviews, BeltTune or FilamentFlow?

BeltTune is rated higher. BeltTune averages 3.5 out of 5 from 2 ratings, while FilamentFlow averages 2.0 from 1 ratings.

### Do BeltTune or FilamentFlow have ads?

Neither BeltTune nor FilamentFlow shows ads.

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

BeltTune ships an update every 7 months, and FilamentFlow every 8 months. Most recently, BeltTune was updated on November 12, 2026 and FilamentFlow on November 7, 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.*