# ARPJAM Studio vs Pendulums

The clearest difference is price: Pendulums at Free against ARPJAM Studio's $12.99. ARPJAM Studio's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs every 4 days). On rating, review sentiment, ratings volume and ads there is nothing between them.

Pendulums is free to download; ARPJAM Studio costs $12.99 up front. Pendulums sells 1 one-off in-app purchase. ARPJAM Studio asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ARPJAM Studio against 5.0 for Pendulums. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ARPJAM Studio ships an update every 2 days, Pendulums every 4 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | ARPJAM Studio | Pendulums |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/arpjam-studio/id6775859535/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/pendulums-chaos-melody/id6803192958/reviews) |
| Number of ratings | **6** | 3 |
| 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 | Paid | **Free with in-app purchases** |
| Size | 84 MB | 25 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Takashi Tsunoda](https://appshunter.io/developer/1884742586) | [Wilfredo Jr Bigol](https://appshunter.io/developer/561703410) |

## What reviewers say

### ARPJAM Studio

[App page](https://appshunter.io/ios/app/arpjam-studio/id6775859535)

This app generates unique musical phrases using user-defined rules and probability. It features multiple sound engines, including arpeggios, bass, drums, and a sampler, allowing for real-time performance and recording. Shape evolving sounds and play along with an in-scale keypad or MIDI controller.

**Highlights:** Generative synth with rule-based phrase creation, Five distinct sound machines (arpeggios, bass, drums, sampler), Real-time performance with in-scale keypad and MIDI support, One-bar looper with performance-based recording, AUv3 plugin for instruments, effects, and MIDI, WAV recording and export functionality

**Features:** Vision Pro support

**In-app purchases:** none


### Pendulums

[App page](https://appshunter.io/ios/app/pendulums-chaos-melody/id6803192958)

This app generates unique musical compositions based on the principles of chaos theory and physics. Users can interact with a pendulum system to influence the music's structure and mood, with no pre-recorded loops or arrangements. It offers a wide range of scales, instruments, and accompaniment styles for creative exploration.

**Highlights:** Chaos theory-driven music generation, Interactive pendulum control, Dynamic song structure based on physics, 26 diverse musical scales, 8 accompaniment styles, Multiple sampled and synthesized instruments, Exportable MIDI files

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock AUv3 | $2.99 | one-time |


## Frequently asked questions

### Is ARPJAM Studio free?

ARPJAM Studio costs $12.99, with no in-app purchases.

### Is Pendulums free?

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

### Which has better reviews, ARPJAM Studio or Pendulums?

ARPJAM Studio and Pendulums are both rated 5.0 out of 5 on the App Store, from 6 and 3 ratings respectively.

### Do ARPJAM Studio or Pendulums have ads?

Neither ARPJAM Studio nor Pendulums shows ads.

### Which is updated more often, ARPJAM Studio or Pendulums?

ARPJAM Studio ships an update every 2 days, and Pendulums every 4 days. Most recently, ARPJAM Studio was updated on November 7, 2026 and Pendulums on November 6, 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.*