Comparison

Beat Kitchen Harmonic Synth vs VU Studio

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

Head to head
About

Beat Kitchen Harmonic Synth

Shape the overtone series directly to create unique sounds. This additive synthesizer allows real-time manipulation of harmonics, LFOs, and envelopes. Explore sound design and synthesis on your device.

Highlights
  • Additive synthesis engine
  • Overtone series shaping
  • Live waveform and spectrum response
  • Modulation matrix with LFOs and envelopes
  • AUv3 support
  • On-device processing
Features
Read full description

BKS Harmonic is an additive synthesizer that builds sound from individual overtones, then gives you tools to shape, scan and filter them by harmony. Load it as an Audio Unit v3 inside AUM, GarageBand, Cubasis, Loopy Pro or any AUv3 host, or run it standalone. A TUNER THAT KNOWS ABOUT STRETCH Tune mode turns the scope into a tuner: it names the note it hears and shows how far sharp or flat it is in cents, with a ring that closes as you land on the pitch. It tunes against the stretch curve rather than equal temperament, so it follows a real instrument. Stretch shapes the overtones inside a note; Key Stretch makes the keyboard follow it, so octaves widen the way a piano's do. FOURTEEN TUNING SYSTEMS, AND A TEMPERAMENT EDITOR Equal and Just, five historical temperaments, and six from outside the European tradition including Maqam Rast, Turkish Rast, Slendro, Pelog and the Harmonic Series. The Temperament slider is a morph, not a switch: fully left is Just, fully right is whichever you chose. Twelve bars show any system as cents away from equal; drag one to make the tuning yours, then copy it out as plain text. Tunings save with the preset. FIVE HUNDRED SCALES Searchable by alternate name: malkauns, nikriz, bhupali and freygish find the right set. THE PARTIALS ARE THE INSTRUMENT The partials display shows every overtone in your sound, and four tools work on it directly. FOLD sweeps upper partials below the fundamental, redistributing energy across harmonic layers — not a filter. The OVERTONE SCAN steps a spotlight through individual partials with triangle, saw or random patterns, and can visit only partials in the active scale. The HARMONIC GATE reinforces partials whose pitch class matches your chord and suppresses the rest: capture a chord, follow MIDI, split the keyboard, or pick the notes on the gate's own keys. SCULPT draws the level and pan of every partial, slides the curve up the grid as a formant, and locks partials in place while the rest moves. THE HARMONIC VOCODER Pass live input or a sample through the synth as an effect. Your sound travels through a bank of tuned peaking bells rather than being replaced by filtered noise: open the Air and the source stays dry, tighten it and the bands resonate into it. Key Track is the mode switch: on it plays as an instrument, off it is a fixed filter you can sweep. Aimed at a sample, the bands track that sample's spectrum as it evolves. One level-matched Blend control crossfades it against the oscillators. PULSE-WIDTH MODULATION Set the core to a saw and Source 2 to a saw: the two ramps subtract, which is what a pulse wave is, and the phase between them sets the duty cycle. Modulate it and you have PWM. A preset in the Utility folder is ready to play. MODULATION A cog on almost every control, so the synth's own engine can drive nearly anything in the interface, including the display. Sources include velocity, envelopes, LFOs, how many notes you hold, how many oscillators sound, the synth's own output level, and Atmo, a shape driven by 84 years of barometric weather data from the Beat Kitchen Weather Sonification Project. Rates run from audio rate down to cycles that span years. THE SCOPE A stereoscope, oscilloscope, spectrum and a live per-partial display. Glow takes the trace from a hard line to a diffuse bloom, Colour sets the hue, Trace Speed and Dot set how it draws — and every one is a modulation target. Route velocity to Colour and the trace shifts as you play. LIVE INPUT A headphone button passes the side-chain straight to the output, so you can hear and see your input with nothing held: green when signal arrives, amber when a bus is connected but silent, red when nothing is. Resynth Speed locks a sample's playback speed to pitch, tape-style, or keeps them independent. Every control has a tooltip, presets work offline, and a harmony wheel follows what you play. One purchase, every update. Made by Beat Kitchen, a music production and teaching community.

About

VU Studio

Create music on the go with a portable beatmaking workstation. Build beats, shape samples, and arrange full tracks with a structured yet fast workflow. Import and edit audio, then organize your ideas into complete songs.

Highlights
  • Portable project workflow
  • Sample shaping and editing
  • Pattern and sequence building
  • Full track arrangement timeline
  • Dedicated editing views
  • Mixer for balancing tracks
  • Live performance effects
Features
Read full description

VU Studio is a beatmaking workstation built for creating ideas, shaping samples, and arranging full tracks in one portable project workflow. Start with pads and sounds, build patterns per group, combine those patterns into sequences, then arrange patterns, sequences, and audio tracks on the song timeline. The workflow is direct enough for sketching beats quickly, but structured enough to grow an idea into a finished arrangement. Import audio into pads, preview waveforms, edit sample regions, and use CHOP to split samples into playable slices. VU Studio keeps imported audio inside the project package, so your songs stay portable instead of depending on temporary file picker paths. Use dedicated views for the way you want to work: - PADS for samples, pad settings, and sound preparation - STEPS for fast pattern programming - PIANO for detailed note and event editing - SEQUENCE for building song sections from patterns - SONG / Timeline for arranging the full track - MIXER for balancing groups, pads, audio tracks, sends, inserts, and master output - LIVE for performance effects and quick sound manipulation - BROWSER for finding and loading audio sources VU Studio projects are saved as managed .vustudio packages. Export creates a portable .vustudio archive for transfer or backup, with project data and assets kept together. On iOS, projects live in Documents so they remain visible in Apple Files. You're a fan of my previous VU202 app? That's great - VU Studio supports .vu202 project file - move your project and keep 100% edit possibilities! Whether you are chopping drum breaks, programming patterns, building sections, importing samples, or moving a project between iOS and desktop, VU Studio is designed around a simple idea: keep the beatmaking flow fast, organized, and portable.

Screenshots

Beat Kitchen Harmonic Synth4 screens
VU Studio4 screens

Verdict

The call

The clearest difference is review sentiment: Beat Kitchen Harmonic Synth at 100% against VU Studio's 56%. Beat Kitchen Harmonic Synth also leads on rating (4.8 vs 4.4). VU Studio's advantage is in-app purchases (none vs 1). On price, ratings volume, update cadence 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

Both are free to download. Beat Kitchen Harmonic Synth sells 1 one-off in-app purchase. VU Studio asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Beat Kitchen Harmonic Synth holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 12 and 7 respectively. Written reviews point the same way: 100% of Beat Kitchen Harmonic Synth's written reviews are positive against 56% of VU Studio's.

UpkeepUpdate frequency

Beat Kitchen Harmonic Synth ships an update every 3 days, VU Studio every 6 days. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
Beat Kitchen Harmonic Synth versus VU Studio: the parameters behind the verdict, then further details
ParameterBeat Kitchen Harmonic SynthVU Studio
PriceFreeFree
Rating4.8 (12 ratings) — better4.4 (7 ratings)
Positive reviews100.0% of reviews — better55.6% of reviews
Number of ratings12 — better7
Update frequencyEvery 3 days — betterEvery 6 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.016.0
Further details — not scored
Size60 MB171 MB
Age rating4+4+
DeveloperBeat Kitchen LLCDariusz Chynek

Customer experience

Beat Kitchen Harmonic Synth

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

VU Studio

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews9 reviews
Positive55.6%
Neutral11.1%
Negative33.3%

In-app purchases

1 purchases

Beat Kitchen Harmonic Synth

One-time1
  • Full Unlock$14.99
None

VU Studio

No in-app purchases

Questions

Is Beat Kitchen Harmonic Synth free?
Beat Kitchen Harmonic Synth is free to download, with in-app purchases available.
Is VU Studio free?
VU Studio is free to download, with no in-app purchases.
Which has better reviews, Beat Kitchen Harmonic Synth or VU Studio?
Beat Kitchen Harmonic Synth is rated higher. Beat Kitchen Harmonic Synth averages 4.8 out of 5 from 12 ratings, while VU Studio averages 4.4 from 7 ratings.
Do Beat Kitchen Harmonic Synth or VU Studio have ads?
Neither Beat Kitchen Harmonic Synth nor VU Studio shows ads.
Which is updated more often, Beat Kitchen Harmonic Synth or VU Studio?
Beat Kitchen Harmonic Synth ships an update every 3 days, and VU Studio every 6 days. Most recently, Beat Kitchen Harmonic Synth was updated on October 12, 2026 and VU Studio on October 5, 2026.

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