# Billie Tracker vs Strange Loop

The clearest difference is in-app purchases: Billie Tracker at none against Strange Loop's 1. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Strange Loop sells 1 one-off in-app purchase. Billie Tracker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Billie Tracker against 5.0 for Strange Loop. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Billie Tracker ships an update every 2 days, Strange Loop every 4 days. The most recent releases landed on October 17, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Billie Tracker | Strange Loop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/billie-tracker/id6792379355/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/strange-loop-chaos-melody/id6795408783/reviews) |
| Number of ratings | 5 | **9** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 23 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Billie Cooperative](https://appshunter.io/developer/1832623915) | [Soft Brew Mobile](https://appshunter.io/developer/561703410) |

## What reviewers say

### Billie Tracker

[App page](https://appshunter.io/ios/app/billie-tracker/id6792379355)

Create music with a powerful groovebox featuring a step sequencer, synthesizers, and a sampler. Arrange patterns into songs, shape unique sounds, and export your finished tracks. Designed for intuitive music production on mobile devices.

**Highlights:** Step sequencer for notes and instruments, Shapeable synth instruments, In-app sampler for recording sounds, Mixer with per-track controls, Song arrangement and export options, Hardware controller support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Strange Loop

[App page](https://appshunter.io/ios/app/strange-loop-chaos-melody/id6795408783)

This app generates unique, non-repeating music using chaos theory and AI. Users can influence the composition by painting on mathematical attractors and mood pads, choosing from various scales, accompaniment styles, and synthesized sounds. It also functions as an AUv3 instrument and MIDI processor.

**Highlights:** AI-generated, non-repeating music, Interactive painting on attractors and mood pads, 26 scales and 7 accompaniment styles, Sampled grand piano and synthesized voices, AUv3 instrument and MIDI processor, MIDI file export, Real-time visual scopes

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock AUV3 Plugin | $2.99 | one-time |


## Frequently asked questions

### Is Billie Tracker free?

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

### Is Strange Loop free?

Strange Loop is free to download, with in-app purchases available.

### Which has better reviews, Billie Tracker or Strange Loop?

Billie Tracker and Strange Loop are both rated 5.0 out of 5 on the App Store, from 5 and 9 ratings respectively.

### Do Billie Tracker or Strange Loop have ads?

Neither Billie Tracker nor Strange Loop shows ads.

### Which is updated more often, Billie Tracker or Strange Loop?

Billie Tracker ships an update every 2 days, and Strange Loop every 4 days. Most recently, Billie Tracker was updated on October 17, 2026 and Strange Loop on November 1, 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.*