# Knob16 vs ARPJAM

The clearest difference is in-app purchases: Knob16 at none against ARPJAM's 1. ARPJAM's advantage is update cadence (daily vs every 6 days) and iOS requirement (15.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. ARPJAM sells 1 one-off in-app purchase. Knob16 asks for nothing beyond the download.

Knob16 ships an update every 6 days, ARPJAM daily. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Knob16 | ARPJAM |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Daily** |
| Monetization | — | Free |
| Size | 7 MB | 7 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [JURIJS KOSKINS](https://appshunter.io/developer/1888330126) | [Takashi Tsunoda](https://appshunter.io/developer/1884742586) |

## What reviewers say

### Knob16

[App page](https://appshunter.io/ios/app/knob16/id6761230712)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Knob16 free?

Knob16 is free to download, with no in-app purchases.

### Is ARPJAM free?

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

### Do Knob16 or ARPJAM have ads?

Neither Knob16 nor ARPJAM shows ads.

### Which is updated more often, Knob16 or ARPJAM?

Knob16 ships an update every 6 days, and ARPJAM daily. Most recently, Knob16 was updated on October 14, 2026 and ARPJAM on October 4, 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.*