Comparison

Beat Kitchen Harmony Wheel vs Coastline

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

Head to head
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
Currently charting
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.

About

Coastline

This app generates unique audio atmospheres and textures for music production. It uses additive and granular synthesis to add depth and character to tracks, offering extensive modulation and a dual-engine sustainer.

Highlights
  • Dual-engine audio sustainer
  • Additive and granular synthesis
  • Custom sample support
  • Intermodulation and advanced filtering
  • Extensive modulation options
  • Cross-platform preset sharing
Features
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Atmosphere machine. Texture generator. Harmonic workstation. A dual-engine audio sustainer with intermodulation, advanced filtering, support for custom samples, and more – all in the service of adding depth and character to your music. Coastline uses a combination of additive and granular synthesis to stretch sounds infinitely. It creates complementary ambience for any sound or composition. It brings a textural “je ne sais quoi” that makes your tracks stand out and feel more alive. Move as quickly as you want: slap it on a track for instant atmosphere, or use it as the recording and processing hub of entire compositions. All recordings happen immediately and automatically – set one volume threshold, and sit back. ENGINES AND EFFECTS • Tide – an additive synthesizer for reimagining sound. Control which frequencies of the input are mapped to oscillators, rebalance them to highlight harmonic or inharmonic characteristics, and introduce new frequencies with waveshaping. • Glade – a granular synthesizer that stretches sound forever with no clicks or transients. Balance the original timbre of your sound against Tide’s distillation of it. • Audio Matrix – route any channel in Coastline to intermodulate another. Create unique harmonic distortions, or load samples to introduce a completely new texture. Includes built-in field samples for naturalistic textures. • Filter – a multi-mode filter for all audio in Coastline, featuring feedback modulation, stereo spread, and independent per-channel controls. • Reverb – a downsampling reverb with a highly configurable chorus section for blending the results of Coastline and introducing another layer of texture and modulation. FEATURES • Modulation – modify any control in Coastline with multiple LFOs, sequencers, smooth random sources, and performance effects. • Presets – full preset control over every parameter in Coastline. Cross-platform preset format for sharing with friends. • Waymaker – connect to Coastline’s sibling application, Waymaker, for sequencing and additional control over the pitch of Coastline’s output. Includes 20+ presets by Peter Bark and imago meri. Also available for macOS and Windows in VST3 / AU / AAX formats from Aqeel Aadam Sound.

Screenshots

Beat Kitchen Harmony Wheel4 screens
Coastline1 screens

Verdict

The call

The clearest difference is price: Beat Kitchen Harmony Wheel at $6.99 against Coastline's $14.99. Beat Kitchen Harmony Wheel also leads on update cadence (every 4 days vs every 3 weeks) and chart position (#192 vs unranked). On rating, review sentiment, ratings volume and ads 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

Beat Kitchen Harmony Wheel costs $6.99 and Coastline $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Beat Kitchen Harmony Wheel against 5.0 for Coastline. Both are backed by a comparable volume of ratings — 9 and 12 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Beat Kitchen Harmony Wheel ships an update every 4 days, Coastline every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 8 level
Beat Kitchen Harmony Wheel versus Coastline: the parameters behind the verdict, then further details
ParameterBeat Kitchen Harmony WheelCoastline
Price$6.99 — better$14.99
Rating5.0 (9 ratings)5.0 (12 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings912 — better
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#192 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size51 MB71 MB
Age rating4+4+
DeveloperBeat Kitchen LLCAqeel Aadam

Customer experience

Beat Kitchen Harmony Wheel

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

Coastline

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Beat Kitchen Harmony Wheel

No in-app purchases

None

Coastline

No in-app purchases

Questions

Is Beat Kitchen Harmony Wheel free?
Beat Kitchen Harmony Wheel costs $6.99, with no in-app purchases.
Is Coastline free?
Coastline costs $14.99, with no in-app purchases.
Which has better reviews, Beat Kitchen Harmony Wheel or Coastline?
Beat Kitchen Harmony Wheel and Coastline are both rated 5.0 out of 5 on the App Store, from 9 and 12 ratings respectively.
Do Beat Kitchen Harmony Wheel or Coastline have ads?
Neither Beat Kitchen Harmony Wheel nor Coastline shows ads.
Which is updated more often, Beat Kitchen Harmony Wheel or Coastline?
Beat Kitchen Harmony Wheel ships an update every 4 days, and Coastline every 3 weeks. Most recently, Beat Kitchen Harmony Wheel was updated on October 28, 2026 and Coastline on October 24, 2026.

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