Making music on a wider instrument
Audio does not care about screen size. Everything you do to audio — a timeline, a mixer, a keyboard, a page of music — is made of width, and a phone has been rationing it.
This is the category with the sharpest split on the site. Listening gains nothing from a folding phone and is not on this list. Making something gains a great deal, because every interface for making music is a grid: tracks against time, keys against octaves, pads against each other, bars across a page. Each of those is unusable below a certain width, and phone versions deal with it by showing you a slice and letting you scroll.
Playing is its own case, and the strongest one here. A musical keyboard has a physical size below which it is not an instrument but a diagram of one, and the same is true of a page of notation on a music stand. Those entries are not about comfort; they are about whether the thing works at all.
Order runs from making to playing to reading, with the one that only matters if you already own a Mac at the end.
- 1
GarageBand
Apple Distribution International
Touch instruments and a multi-track recorder already on the phone, with Live Loops for building a track out of cells rather than a timeline. Both halves are grids, and a keyboard you play with your fingers has a size below which it stops being playable.
- 2
Ferrite Recording Studio
Wooji Juice Ltd
Audio editing aimed at podcasts, radio journalism and voice work, which means long recordings rather than short loops. Editing speech is scrubbing a waveform to find a breath, and a wider waveform is literally more resolution per second of audio.
- 3
Koala Sampler • Beat Maker
Mazbox Limited
Record anything with the microphone, chop it, and build a track out of it — a sampler designed for a pocket. Pads are a grid, and a grid gets better when the squares get bigger, which is as close to a pure screen-size argument as this list has.
- 4
djay - DJ App & AI Mixer
Algoriddim GmbH
Two decks, a mixer and your own music library, with streaming services connected. Decks side by side is the layout of the actual hardware, and it is the layout a phone has to fake by showing one deck at a time.
- 5
Moises AI: The Musician's App
Moises Systems Inc
Separates a song into stems so you can mute the part you want to play yourself, and change key or tempo. The useful view is all the stems at once with their controls, which is a mixer, which is width.
- 6
BandLab – Music Making Studio
BandLab Singapore Pte Ltd
A free multi-track studio with a collaboration network attached, used heavily by people who do not own a desktop studio. Same timeline argument as any DAW: how much of the arrangement you can see is how much of it you can work on.
- 7
Launchpad - Music & Beat Maker
Focusrite Audio Engineering Ltd.
The grid-of-cells remixing instrument, from the company that makes the hardware version. The hardware is an eight-by-eight grid because that is a size your hands can play; a phone screen makes the same grid a thing you tap carefully.
- 8
forScore
forScore LLC
Sheet music, and the clearest case on the whole site. Music is engraved for a page at a size a musician can read at arm's length on a stand. Everything a phone-sized reader does — cropping, half-pages, reflowing — is a workaround for not being that size.
- 9
MuseScore－Sheet Music & Chords
MuseScore Limited
A very large library of scores to play from, with playback and chords. Same reading argument as above, with the difference that the catalogue is the reason to be here rather than your own PDFs.
- 10
Logic Remote
Apple Distribution International
Not an instrument but a control surface: a mixer, transport and touch instruments for Logic or GarageBand running on a Mac. A mixer is faders side by side, so the number of channels you can control at once is a direct function of how wide the screen is.
The selection and the order are ours. Each entry is written from that app’s own App Store listing, linked beside it, and this page from Apple's iPhone Duo product page. Drafted with AI assistance and checked back against those sources before publishing; the disclosure page explains how. The iPhone Duo has been on sale since 23 October 2026 and nothing here has been seen running on one, so what each entry says about the fold is an argument rather than a test.