# NullPerator — A pocket music tracker

> A pocket music tracker (iPhone/iPad app by 203 Systems.)

- Source: https://appshunter.io/ios/app/nullperator/id6810035878 (this page in markdown: same URL + `.md`)
- Developer: [203 Systems](https://appshunter.io/developer/6810035880)
- Category: Music, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-09-14
- Data updated: 2026-10-06
- User reviews in markdown: https://appshunter.io/ios/app/nullperator/id6810035878/reviews.md

## What is NullPerator?

NullPerator brings the focused tracker workflow to iPhone and iPad.

Compose patterns, arrange songs, record samples, and play them back through a compact interface designed around the NullPerator hardware. Use the on-screen controls or connect a compatible game controller. Route MIDI, keep projects in the Files app, and continue working without an account.

Features:

• Tracker composition and playback
• Touch controls optimized for portrait and landscape layouts
• Compatible game controller input
• MIDI routing, including supported Bluetooth MIDI devices
• Sample recording through the current iOS audio input
• Local project and sample storage through the Files app
• iPhone and iPad support

Your projects and settings stay on your device. NullPerator does not include advertising, analytics, or account tracking.


## Version history (last 3 releases)

### 0.2 — 2026-09-17

What's new in NullPerator 0.2

- Added GB-Wave, GB-Pulse and GB-Noise instruments for Game Boy-style sounds and an LSDJ-inspired sound-design experience.
- Made all 64 instrument slots flexible, with dynamically allocated synth resources.
- Added a two-dimensional instrument selector: hold Enter on the instrument Type row, choose a sound engine, and release Enter to confirm.
- Balanced synth output levels against sample playback.
- Kept autosaves separate from manual saves. Projects now open the manual save, use npsong.dat for new saves, and retain compatibility with lgptsav.dat.
- Corrected the iOS controller Play and Shift mapping.
- Fixed sample importing after a type change, saving unedited recordings, delayed-note volume, and small display issues.

iOS 17.0 or later is still required.

### 0.1.1 — 2026-09-16

• Added the Chiptune instrument and new commands for Chiptune, Stack, and Sample instruments.
• Reorganized the FX selector by command group, with instrument support indicators and contextual parameter help.
• Improved sample importing, recording, editing, slicing, and playback controls.
• Improved compatibility with other audio and MIDI apps, and reduced recording clicks.
• Fixed Large UI layouts and refined instrument pages and navigation.

### 0.1 — 2026-09-15

No release notes.

## Apps similar to NullPerator

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| --- | --- | --- | --- |
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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-06.*