# ARPJAM vs Bacteria Music

The clearest difference is in-app purchases: Bacteria Music at none against ARPJAM's 1. ARPJAM's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ARPJAM sells 1 one-off in-app purchase. Bacteria Music asks for nothing beyond the download.

ARPJAM ships an update daily, Bacteria Music every 2 days. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ARPJAM | Bacteria Music |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arpjam/id6762045552/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Monetization | Free | — |
| Size | 7 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takashi Tsunoda](https://appshunter.io/developer/1884742586) | [Soundtron Studios LLC](https://appshunter.io/developer/6787320351) |

## What reviewers say

### ARPJAM

[App page](https://appshunter.io/ios/app/arpjam/id6762045552)

This app generates evolving ambient music using two independent arpeggio engines. It features a generative drum machine, sound design tools, and external instrument synchronization. Save and recall your favorite musical setups.

**Highlights:** Dual arpeggio engines, Generative drum machine, Sound design controls, External instrument sync (Ableton Link, MIDI Clock), Save and recall presets, Built-in timer

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Bacteria Music

[App page](https://appshunter.io/ios/app/bacteria-music/id6787320349)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ARPJAM free?

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

### Is Bacteria Music free?

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

### Do ARPJAM or Bacteria Music have ads?

Neither ARPJAM nor Bacteria Music shows ads.

### Which is updated more often, ARPJAM or Bacteria Music?

ARPJAM ships an update daily, and Bacteria Music every 2 days. Most recently, ARPJAM was updated on October 4, 2026 and Bacteria Music on October 10, 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.*