Comparison

iKoto vs Koto Sim

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

Head to head
About

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.

Highlights
  • Virtual Koto instrument
  • Recording function
  • Tone scale changes
  • Pitch-bend function
  • WAV file export via WiFi
  • Preset tone scales
  • Sample music included
Features
Read full description

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*

About

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.

Highlights
  • Authentic koto sounds
  • Customizable interface and tuning
  • Three dynamic play modes
  • Built-in recorder
  • Screen recording for sharing
  • Immersive simulation environment
Features
Read full description

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

iKoto3 screens
Koto Sim4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
iKoto versus Koto Sim: the parameters behind the verdict, then further details
ParameteriKotoKoto Sim
Price$2.99Free — better
Rating4.5 (8 ratings)5.0 (4 ratings) — better
Positive reviews85.6% of reviews—
Number of ratings8 — better4
Update frequencyEvery 2 monthsEvery 4 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.0 — better12.0
Further details — not scored
Size10 MB125 MB
Age rating4+4+
DeveloperGClue, Inc.Alper Kahriman

Customer experience

iKoto

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews201 reviews
Positive85.6%
Neutral5.5%
Negative9.0%

Koto Sim

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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
Show 5 more
  • 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
Show 9 more
  • 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

None

iKoto

No in-app purchases

1 purchases

Koto Sim

One-time1
  • Get Premium$8.99

Questions

Is iKoto free?
iKoto costs $2.99, with no in-app purchases.
Is Koto Sim free?
Koto Sim is free to download, with in-app purchases available.
Which has better reviews, iKoto or Koto Sim?
Koto Sim is rated higher. iKoto averages 4.5 out of 5 from 8 ratings, while Koto Sim averages 5.0 from 4 ratings.
Do iKoto or Koto Sim have ads?
Koto Sim shows ads; iKoto does not.
Which is updated more often, iKoto or Koto Sim?
iKoto ships an update every 2 months, and Koto Sim every 4 weeks. Most recently, iKoto was updated on October 17, 2026 and Koto Sim on October 6, 2026.

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