iKoto vs Koto Sim
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*
Koto Sim
Experience the authentic sound and feel of Japan's national string instrument. This app offers realistic koto tones, customizable interfaces, and multiple play modes for musicians and enthusiasts. Record and share your creations within an immersive simulation.
- Authentic koto sounds
- Customizable interface and tuning
- Three dynamic play modes
- Built-in recorder
- Screen recording for sharing
- Immersive simulation environment
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Step into the serene world of the koto, Japan's national string instrument, celebrated for its delicate tones and timeless beauty. Koto Sim brings the authentic sound and feel of this iconic instrument to your fingertips, offering a realistic and inspiring platform for musicians, learners, and music enthusiasts. About the Koto The koto is a traditional Japanese string instrument with a long, elegant body and movable bridges. Typically with 13 strings (though there are variations), it produces a bright, resonant sound that is both calming and expressive. Rooted in Japanese classical music, the koto has evolved into modern genres, creating a harmonious blend of tradition and innovation. Why You’ll Love Koto Sim Authentic Koto Sounds Enjoy meticulously sampled koto tones, capturing the instrument’s bright, resonant, and expressive character. Perfect for traditional Japanese melodies or exploring modern compositions. Customizable Interface Adjust the key layout, bridge positions, and even tuning settings with advanced controls like microtone adjustments and transpose. Whether you’re performing classic koto pieces or crafting a new tuning style, Koto Sim adapts effortlessly to your creative flow. Three Dynamic Play Modes Free Play Mode: Play multiple strings to create rich, layered harmonies and flowing melodies. Single Note Mode: Focus on individual strings — ideal for mastering traditional techniques and scales. Soft Release Mode: Add a natural fade-out effect for smooth, authentic performances. Record and Share Your Music Capture your koto music effortlessly with the built-in recorder — or go one step further and record your entire screen performance to share with the world. Whether for progress tracking, social media, or artistic expression, sharing is seamless and intuitive. Immersive Simulation Screen Dive into a visually detailed, lifelike simulation environment that replicates the experience of playing a real koto. The authentic layout and animations make every note feel genuine. What Makes Koto Sim Unique? True-to-Life Sound: Every note replicates the elegant, resonant tones of a real koto, offering an authentic musical experience. Cultural Significance: Immerse yourself in the heritage of Japanese classical music while exploring modern adaptations. Elegant Design: A sleek, intuitive interface ensures a seamless experience for musicians of all levels. Creative Freedom: From traditional koto melodies to experimental microtonal fusion, Koto Sim opens the door to limitless musical expression. Download Koto Sim today and let the graceful tones of the koto inspire your music!
Screenshots
Verdict
The clearest difference is price: Koto Sim at Free against iKoto's $2.99. Koto Sim also leads on rating (5.0 vs 4.5) and update cadence (every 4 weeks vs every 2 months). iKoto's advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume, device support and iOS requirement 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
Koto Sim is free to download; iKoto costs $2.99 up front. Koto Sim sells 1 one-off in-app purchase. iKoto asks for nothing beyond the download.
Koto Sim holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 8 and 4 respectively.
iKoto ships an update every 2 months, Koto Sim every 4 weeks. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.
| Parameter | iKoto | Koto Sim |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.5 (8 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 85.6% of reviews | — |
| Number of ratings | 8 — better | 4 |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 10 MB | 125 MB |
| Age rating | 4+ | 4+ |
| Developer | GClue, Inc. | Alper Kahriman |
Customer experience
iKoto
Koto Sim
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
Koto Sim
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iKoto
No in-app purchases
Koto Sim
- Get Premium$8.99









