M vs AU Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
M
This app automatically composes original music based on your chosen settings for duration, tempo, and style. You can refine compositions by liking or disliking sections, and export generated music in MP3, MIDI, or sheet music formats. It's designed for content creators, producers, and music enthusiasts.
- Automated music composition
- Customizable duration, tempo, and style
- Like/Dislike feedback for refinement
- Export in MP3, MIDI, and PDF formats
- Track Editor for rewriting sections
- Separate track generation (melody, harmony, bass, percussion)
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For best results, please use headphones/speakers and stable broadband connection. M-Gen is a unique app that automatically composes musical content for: - Content creators - Music producers - Games creators - Students of music - Music lovers Simply tap the red button and send the generated music to your Email account or Google Drive in the following formats: - MP3 - for listening or mixing - MIDI - for using with DAW software - PDF - for reading and playing sheet music Please use earphones/speakers for best results. Also, this app has NO ADS! ==========FREE FUNCTIONALITY========== - endless source of musical compositions and ideas - keep tapping the red button until you hear something you like - use the Setup Wizard to adjust duration, tempo and style of song - use Track Editor to have tracks re-written until you love the song - select melody/harmony/bassline/percusion/effects tracks to be generated separately or together as a song - use Like/Dislike buttons whilst listening to rewrite sections of a song - select the number of instrumental layers in each track (4 max, 8 for percussion) - select key/tempo/soundset/style - select structure of song using chorus/verse/middle-eight sections - name and then store up to 5 generated songs on your device for later listening ==========IN-APP PURCHASES========== - Downloads Pack (one-off payment) - send MP3, MIDI and PDF (sheet music) files of the generated music to your Email account or Google Drive. - Library Expansion (one-off payment) - increase the number of slots in your device's M-Gen library so you can store more songs for later listening - 'License Pack' (subscription) - License to use M-Gen music in your own work and distribute it on a commercial basis M-Gen ("Music Generator") creates random yet tonally and rhythmically integrated songs based on a number of settings you can play with in the Setup section together with user feedback on previous songs. You can use the Setup Wizard in the Play tab to quickly and easily configure duration, speed and style of the song. During playback, you can tap like/dislike buttons. Disliked sections can be rewritten by M-gen, keeping the rest of the song intact. Liked sections will provide M-Gen with clues as to how you like your songs to sound that will be used when composing future songs or song parts. The algorithms used by M-Gen are always evolving and improving to include more possible musical structures and methods of composition. The app has no advertising and there's no need to set up an account. Simple! ==========MIDI TRACKS========== In your DAW, the following generated tracks use these MIDI track numbers: Percussion - 10 Bassline - 11 Harmony - 12 Melody - 13 Effects - 14 Enjoy!!!
AU Studio
This app acts as a dedicated host for Audio Unit extensions, allowing musicians and developers to inspect, audition, and test installed audio plugins. It provides detailed information about each unit's capabilities and behavior without requiring a full digital audio workstation.
- Scan and catalog installed Audio Units
- Filter plugins by developer, type, and status
- Load AUv3 interfaces or use detailed inspector
- Inspect registry identity, MIDI support, and parameters
- Route CoreMIDI sources and audition audio effects
- Monitor runtime CPU and memory usage
- Built-in manual for guidance
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AU Studio is a focused Audio Unit host, not a DAW. Open the plug-ins you already own, hear them in seconds, and see exactly what they expose. Made for musicians, sound designers, and Audio Unit developers who need a fast, honest test bench. No session to build, no tracks to arm. Pick a unit from your catalog and its interface opens in a panel of its own, named and sized to the plug-in, with your host controls in a bar above it. Key features: - Scan the instruments, effects, music effects, generators, and MIDI processors already installed on your device: AUv3 on iPhone, iPad, and Apple Vision Pro, plus AUv2 on Mac. - Filter by developer, type, or search text, and hide Apple built-ins to focus on third-party gear. - Open a plug-in's own interface when it ships one, and fall back to a metadata view when it doesn't, with the full inspector always one tap away. - Inspect identity, four-character codes, version, sandbox and cached validation status, MIDI support, busses, parameters, presets, latency, and tail time. - Step through factory presets, then save your own working state without leaving the interface. - Play instruments from the floating MIDI keyboard: notes, pitch bend, mod wheel, auto, mono or poly voicing, a shiftable range, and one-tap panic for stuck notes. Your hardware controller lights up the on-screen keys as you play. - Run a guitar, a microphone, or any channel of your interface through a loaded effect. Pick the device, pick mono or stereo, pick the channels. - Load a track into the floating media player, scrub the waveform, loop a section, and play along with your live input at the same time. - Check a signal path in seconds with the built-in test tone. - Route external CoreMIDI sources in, and send generated MIDI back out to a CoreMIDI destination. - Test MIDI 2 units with automatic, MIDI 1, or MIDI 2 protocol selection: high-resolution notes, registered and per-note controllers, per-note pitch bend, discovered MIDI-CI Profiles, and a monitor showing raw or decoded MIDI going in and coming out. - Choose your output device on Mac, and set sample rate, buffer size, and which MIDI sources are enabled. - Keep host-process CPU and memory in view while you work. - Open unfamiliar plug-ins with less risk. AU Studio asks first when the system does not mark a unit sandbox-safe, and a peak limiter sits across the host output. - Read the built-in manual, fully searchable: discovery, routing, presets, hardware input, floating tools, troubleshooting, and developer notes. What AU Studio is: A focused host for discovering, opening, auditioning, and inspecting the Audio Units already on your device. It answers the practical questions: Is the unit visible? Does it load? Does it have an interface? What busses, parameters, presets, and MIDI capabilities does it expose? Does MIDI reach it? Does audio pass through it? What AU Studio is not: It is not a DAW. No multitrack recording, clip launching, timeline arrangement, piano-roll sequencing, MIDI learn, automation lanes, song export, or mastering tools. AU Studio ships no Audio Unit of its own — no instrument, no effect, no DSP engine. It hosts the units other apps provide and wraps them in host-owned routing, auditioning, and inspection. Discovery uses the system Audio Unit registry. If a provider app is not installed, not enabled, or not visible to the platform, AU Studio cannot invent it. Interface behavior, presets, parameter meaning, MIDI mapping, and DSP results belong to each Audio Unit.
Screenshots
Verdict
The clearest difference is review sentiment: AU Studio at 50% against M's 0%. AU Studio also leads on rating (4.5 vs 2.5) and in-app purchases (none vs 5). M's advantage is price (Free vs $9.99) and iOS requirement (12.0 vs 17.0). On ratings volume, update cadence and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
M is free to download; AU Studio costs $9.99 up front. M sells 5 in-app purchases, starting at $3.49 per month. AU Studio asks for nothing beyond the download.
AU Studio holds the better App Store score, 4.5 against 2.5. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 0% of M's written reviews are positive against 50% of AU Studio's.
M ships an update every 3 weeks, AU Studio monthly. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.
| Parameter | M | AU Studio |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 2.5 (4 ratings) | 4.5 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 4 | 4 |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | — | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 25 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Nick Carter-Bond | Christian Thompson |
Customer experience
M
AU Studio
In-app purchases
M
- Commercial Use License$3.491 Month
- Sharing Pack$4.491 Month
- Library Expansion (+50 slots)$2.99
- Library Expansion (+100 slots)$4.99
- Downloads Pack$6.99
AU Studio
No in-app purchases









