Comparison

AU Studio vs Beat Kitchen Harmony Wheel

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Read full description

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.

About

Beat Kitchen Harmony Wheel

This app analyzes music in real-time, identifying chords, their functions within a key, and recording progressions. It also includes a tuner, metronome, and key detection for producers and musicians.

Highlights
  • Real-time chord and key identification
  • Chord function labeling (I, IV, V, etc.)
  • Recording of musical progressions
  • MIDI input with built-in synth
  • Real-time tuner and metronome
  • Key detection for DJs
Features
Read full description

The Beat Kitchen Harmony Wheel is a musician and producer toolkit — a tuner for chords and a measurement device for the vitals of the music in front of you. Point it at your mic or play it over MIDI, and it reads the harmony as it happens — the chord, the key, and the job that chord is doing. Works on piano, guitar, or recorded music with clear harmonic movement. It identifies each chord's role, not just its name, using the Beat Kitchen Ten Chord Toolkit (explained in the guidebook built into the app): the tonic (I) you keep coming back to, the IV that opens things up, the V that wants to resolve, a V/vi setting up a detour, a bVII pulled from the parallel minor. The matching wedge lights up as you play. What it does Hears chords from your mic in real time, right on your device — nothing leaves your phone Labels the wheel by function, not just by chord name: I, ii, IV, V, V/vi, bVII, and the rest Records what you played so you can study the path a progression took Tap any wedge to hear the chord Takes MIDI in, wired or over Bluetooth, with a built-in synth Locks to your key so the wheel orients to the music you're in A Learn tab that walks through what you're looking at If you've reached for a circle of fifths or a key finder before, you're in the same neighborhood — except this one works in real time, while the music is still playing. Producer Tools A tuner and a metronome, built for the studio. Check your tuning. Tap a tempo or let the mic detect it for you, then read it in BPM and in milliseconds for every subdivision — with your own click sound on each one. Watch the beat pulse from across the room and feel it in your pocket with haptics (iPhone). And because the wheel already reads your key in real time, it doubles as a key detector for DJs lining up harmonic transitions. Who it's for Producers, DJs, songwriters, students, and anyone who can tell a progression is doing something to them but can't always say what. You don't need to read music. You need to be curious about why a few chords in a row can move you. It's theory you can hear before you can spell it. Beat Kitchen is a school that teaches harmony by ear and by function first. Harmony Wheel puts that same way of listening on your phone.

Screenshots

AU Studio4 screens
Beat Kitchen Harmony Wheel4 screens

Verdict

The call

The clearest difference is review sentiment: Beat Kitchen Harmony Wheel at 100% against AU Studio's 50%. Beat Kitchen Harmony Wheel also leads on rating (5.0 vs 4.5) and update cadence (every 4 days vs monthly). On ratings volume, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

AU Studio costs $9.99 and Beat Kitchen Harmony Wheel $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Beat Kitchen Harmony Wheel holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 8 respectively. Written reviews point the same way: 50% of AU Studio's written reviews are positive against 100% of Beat Kitchen Harmony Wheel's.

UpkeepUpdate frequency

AU Studio ships an update monthly, Beat Kitchen Harmony Wheel every 4 days. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
AU Studio versus Beat Kitchen Harmony Wheel: the parameters behind the verdict, then further details
ParameterAU StudioBeat Kitchen Harmony Wheel
Price$9.99$6.99 — better
Rating4.5 (4 ratings)5.0 (8 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings48 — better
Update frequencyMonthlyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad, iPod
Requires iOS17.014.0 — better
Further details — not scored
Size7 MB51 MB
Age rating4+4+
DeveloperChristian ThompsonBeat Kitchen LLC

Customer experience

AU Studio

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Beat Kitchen Harmony Wheel

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

AU Studio

No in-app purchases

None

Beat Kitchen Harmony Wheel

No in-app purchases

Questions

Is AU Studio free?
AU Studio costs $9.99, with no in-app purchases.
Is Beat Kitchen Harmony Wheel free?
Beat Kitchen Harmony Wheel costs $6.99, with no in-app purchases.
Which has better reviews, AU Studio or Beat Kitchen Harmony Wheel?
Beat Kitchen Harmony Wheel is rated higher. AU Studio averages 4.5 out of 5 from 4 ratings, while Beat Kitchen Harmony Wheel averages 5.0 from 8 ratings.
Do AU Studio or Beat Kitchen Harmony Wheel have ads?
Neither AU Studio nor Beat Kitchen Harmony Wheel shows ads.
Which is updated more often, AU Studio or Beat Kitchen Harmony Wheel?
AU Studio ships an update monthly, and Beat Kitchen Harmony Wheel every 4 days. Most recently, AU Studio was updated on October 1, 2026 and Beat Kitchen Harmony Wheel on October 12, 2026.

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