iKoto vs midiOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iKoto
Experience the traditional Japanese Koto (harp) on your iPhone. This app allows you to play oriental melodies, record your performances, and utilize features like tone scale changes and pitch bends. Enjoy a selection of sample music and export your recordings.
- Virtual Koto instrument
- Recording function
- Tone scale changes
- Pitch-bend function
- WAV file export via WiFi
- Preset tone scales
- Sample music included
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iKoto is an application for playing Koto(Japanese Harp) on iPhone. Koto is a Japanese traditional stringed musical instrument that can produce oriental tone. Recording, playing, and demonstration functions are installed. There are tone scale change and pitch-bend functions. If you like Harp, you will like Koto too. Enjoy Japanese traditional sound. The following three pieces of sample music are installed. -Sakura -Rokudan -Fur Elise Recording data can be stored up to three. iKoto has a function to output recording-data into PC as WAV-file via WiFi. The following eleven tones scale are preset. Hira,Kumoi,Hon-Kumoi,Han-Kumoi,Kata-Kumoi Nakazora,Iwato,Akebono,Nogi,Gaku,Hanagumo *Be sure your iPhone is not in silent mode*
midiOS
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Before installing, visit midios.app/setup for setup instructions. midiOS is a new kind of instrument. Transform your iPhone into an expressive MIDI instrument with advanced harmony, multidimensional performance control, and deep DAW integration. Play notes, chords, scales, arpeggios, modulation, and complete live performances from the device you already carry. With Offline Play, midiOS becomes a self-contained instrument. Choose from built-in sounds, create an instrument rack, record or import personal samples, and capture performances in Offline LiveGrid—without a Mac, DAW, account, or network connection. Designed for musicians, midiOS opens ready to perform. Tap pads to play notes, chords, and scales. Change keys, modes, voicings, and tonal centers without interrupting your flow. Swipe across pads to explore inversions, chord qualities, suspensions, secondary dominants, chromatic movement, and harmonic variations. Every gesture can become musical. Shape your performance with multi-touch, directional gestures, device motion, aftertouch, pitch movement, XY pads, sliders, knobs, and macros. Optional facial controls let head and expression movements influence harmony, modulation, register, and other performance destinations in real time. Performance Modes transform these inputs into coordinated musical systems. Intelligent voice leading keeps chords connected, expressive harmony controls create fluid transitions, and synchronized arpeggiation follows your DAW’s tempo and phase without restarting the pattern. Built-in modes provide focused setups for piano performance, harmony exploration, musical learning, generative flow, and Ableton control, while Custom Mode lets you create your own instrument. Save complete instruments and performance setups in the Layout Library, then switch between them quickly. Discover and install compatible instruments through the midiOS Marketplace, or transfer your own layouts securely between midiOS and the midiOS Bridge. Using the free midiOS Bridge for Mac, connect over USB or Wi-Fi for a fast, authenticated MIDI connection to your computer. midiOS works with MIDI-compatible software and offers deep Ableton Live integration, including clip and scene launching, transport, session navigation, mixer controls, macros, and real-time visual feedback on your iPhone. Rotate your device to enter LiveGrid and transform your iPhone into a live performance controller. Launch clips and scenes, navigate your session, control transport, and manage your performance from across the stage or studio. Built for live performance, midiOS combines responsive MIDI, intelligent harmony, stable note ownership, fast layout switching, haptic feedback, visual feedback, and automatic reconnection in a workflow designed to keep you focused on making music. Most MIDI apps give you buttons. midiOS gives you an instrument that responds to how you play. Learn more at midios.app.
Screenshots
Verdict
The clearest difference is price: iKoto at $2.99 against midiOS's $24.99. iKoto also leads on iOS requirement (11.0 vs 26.0). midiOS's advantage is update cadence (every 3 days vs every 2 months). On ads, in-app purchases 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
iKoto costs $2.99 and midiOS $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iKoto ships an update every 2 months, midiOS every 3 days. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.
| Parameter | iKoto | midiOS |
|---|---|---|
| Price | $2.99 — better | $24.99 |
| Rating | 4.5 (8 ratings) — better | — |
| Positive reviews | 85.6% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 10 MB | 341 MB |
| Age rating | 4+ | 4+ |
| Developer | GClue, Inc. | jason merrill |
Bugs and requests
iKoto
Reported bugs
10 issues- App crashes on startup or immediately after opening
- Sound output fails without clear cause
- Tuning selection screen displays blank/white text
- Unable to change tuning modes
- App crashes when entering settings or changing notes
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- Crashes when transferring songs
- Crashes during recorded music playback
- Display not optimized for newer screen sizes
- Crashes at low battery levels
- Incompatibility with latest iOS versions
Requested features
14 requests- Custom tuning/string adjustment capability
- Support for modern music scales and genres
- More pre-recorded demo songs
- Ability to save unlimited recordings
- MIDI file import/export functionality
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- Continuous loop playback for accompaniment
- Pitch bend control via accelerometer
- Additional Japanese instruments (Biwa, Shamisen, Shakuhachi)
- Ambient background sounds (water, wind, birds)
- Longer note sustain when holding strings
- Variable string plucking force control
- Auto-generated peaceful melodies
- Octave change controls
- Ability to save compositions with titles
midiOS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iKoto
No in-app purchases
midiOS
No in-app purchases









