Best Ruku Kobayashi Apps & Games

19+ iOS apps & games curated and reviewed

4.7 avg rating
16 free apps & games
Updated May 2026

From beginner-friendly picks to power-user tools, our ruku kobayashi list covers 19+ iPhone apps and games updated through May 2026. Compare ratings, prices, and screenshots in one place.

Compare top Ruku Kobayashi Apps & Games (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Piano Note Reading TrainerPiano Note Reading TrainerFree4.3★ (6)NoYesAug 2026
2KeyPalette - Piano Chord&ScaleKeyPalette - Piano Chord&ScaleFree5.0★ (3)NoYesMay 2026
3Piano Chord Guide: Chord GamePiano Chord Guide: Chord GameFree5.0★ (2)NoYesAug 2026
4Chord Sense TrainerChord Sense TrainerFreeNoYesAug 2026
5Photo Compressor - AshkunPhoto Compressor - AshkunFreeNoYesJun 2026
6Photo Card JournalPhoto Card JournalFreeNoYesAug 2026
7Merge Puzzle Assort: 2048Merge Puzzle Assort: 2048FreeYesNoMay 2026
8RandientRandient$1.99NoNoJul 2026

Top Picks for Ruku Kobayashi

Piano Note Reading Trainer#1

Piano Note Reading Trainer by Ruku Kobayashi

Get better at sight-reading!
Editor's Choice
📚 Education
4.3(6 ratings)
FreeIn-App Purchases
Piano Note Reading Trainer screenshot 1
Piano Note Reading Trainer screenshot 2
Piano Note Reading Trainer screenshot 3
Piano Note Reading Trainer screenshot 4
Piano Note Reading Trainer screenshot 5
Piano Note Reading Trainer screenshot 6

Enhance your musical sight-reading abilities with interactive, game-like exercises. This app offers a structured approach to learning notes, supporting MIDI keyboards and providing detailed progress tracking. Unlock advanced features and customization options with a premium subscription.

KeyPalette - Piano Chord&Scale#2

KeyPalette - Piano Chord&Scale by Ruku Kobayashi

Freely display chords & scales
Strong Contender
🎵 Music
5.0(3 ratings)
FreeIn-App Purchases
KeyPalette - Piano Chord&Scale screenshot 1
KeyPalette - Piano Chord&Scale screenshot 2
KeyPalette - Piano Chord&Scale screenshot 3
KeyPalette - Piano Chord&Scale screenshot 4
KeyPalette - Piano Chord&Scale screenshot 5
KeyPalette - Piano Chord&Scale screenshot 6

Visualize piano chords and scales instantly. This app helps musicians understand relationships between notes, compose, analyze music, and study theory without needing books or websites. It offers a large library and custom creation options.

Piano Chord Guide: Chord Game#3

Piano Chord Guide: Chord Game by Ruku Kobayashi

Connecting "Keys" and "Name"
Worth Considering
🎮 Games
5.0(2 ratings)
FreeIn-App Purchases
Piano Chord Guide: Chord Game screenshot 1
Piano Chord Guide: Chord Game screenshot 2
Piano Chord Guide: Chord Game screenshot 3
Piano Chord Guide: Chord Game screenshot 4

Learn piano chords with interactive quizzes and a game-like progression. Customize chord symbols and choose themes, including dark mode. A premium purchase unlocks custom modes for personalized learning.

More Ruku Kobayashi apps to explore

4
Chord Sense Trainer
Chord Sense Trainer
Chord Sense Trainer
Connecting "Sound" and "Name"
Free

This app helps musicians and aspiring musicians develop their ability to identify chords by ear. It offers quiz-style training that progresses in difficulty, with a custom mode for personalized practice. Train your ear for music transcription and composition anytime, anywhere.

Quiz-style chord recognitionProgressive difficulty levelsCustom training mode
🎮 Games
(0)
freemium
5
Photo Compressor - Ashkun
Photo Compressor - Ashkun
Photo Compressor - Ashkun
Privacy-first, easy to use
Free
📷 Photo & Video
(0)
6
Photo Card Journal
Photo Card Journal
Photo Card Journal
Make "Memories" into "Cards"
Free
🌟 Lifestyle
(0)
7
Merge Puzzle Assort: 2048
Merge Puzzle Assort: 2048
Merge Puzzle Assort: 2048
Lots of game modes
Free
🎮 Games
(0)
8
Randient
Randient
Randient
Random Gradient Wallpapers
$1.99
🎨 Graphics & Design
(0)
9
Piano Note Reading Trainer EDU
Piano Note Reading Trainer EDU
Piano Note Reading Trainer EDU
Get better at sight-reading!
$11.99
📚 Education
(0)
10
Horror escape game 3D
Horror escape game 3D
Horror escape game 3D
by naoya kobayashi
Free

Explore a spooky 3D building, solve mysteries, and find items to escape. Use touch controls to move, change your view, and interact with suspicious areas. Save your progress frequently to avoid losing your game.

3D horror environmentMystery solving puzzlesItem collection and use
🎮 Games
(8)
free
11
SPEED:3D Racing
SPEED:3D Racing
SPEED:3D Racing
by MASAKI KOBAYASHI
Free

Test your reflexes in this challenging racing game. Prove your genius by mastering its demanding gameplay. It's designed for players who enjoy high-speed, skill-based experiences.

Reflex-based gameplayChallenging difficulty3D racing environment
🎮 Games
(0)
free
12
DQW攻略 for ドラクエウォーク(ドラクエ)
DQW攻略 for ドラクエウォーク(ドラクエ)
DQW攻略 for ドラクエウォーク(ドラクエ)
最新情報や攻略情報満載のドラゴンクエストウォーク攻略アプリ
Free
📡 News
(0)
13
くらげシューティング!簡単ひまつぶしゲームアプリ
くらげシューティング!簡単ひまつぶしゲームアプリ
くらげシューティング!簡単ひまつぶしゲームアプリ
by Shohei Kobayashi
Free
🎮 Games
(0)
14
ブラック企業
ブラック企業
ブラック企業
by hidehiko aihara
Free
📡 News
(0)
15
GakuLink
GakuLink
GakuLink
お得な情報をGET!!
Free
🌟 Lifestyle
(0)
16
YUKI
YUKI
YUKI
by masaki sato
Free
🎬 Entertainment
(0)
17
FruitHabit - Diet app
FruitHabit - Diet app
FruitHabit - Diet app
Easy health management beauty
Free
🌟 Lifestyle
(0)
18
snapfc
snapfc
snapfc
by keisuke nakamura
Free
💪 Health & Fitness
(0)

FAQ about Ruku Kobayashi

What are the best ruku kobayashi apps & games for iPhone?
Piano Note Reading Trainer tops our ruku kobayashi apps & games ranking as of May 2026, with a 4.3-star average from 6 App Store ratings, and it's free to download.
Yes — 16 of the top ruku kobayashi apps & games we rank are free to download, including Piano Note Reading Trainer and KeyPalette - Piano Chord&Scale.
Piano Note Reading Trainer has no ads and offers in-app purchases, according to its App Store listing as of May 2026.
We track 19+ ruku kobayashi apps & games on the iOS App Store as of May 2026, ranked by rating, recency, and analysis of real user reviews.
Piano Note Reading Trainer is an educational app designed to help users improve their ability to read musical notes efficiently. It uses game-like exercises and provides tools for tracking progress and accuracy.
The app offers game-like note-reading training with simple tap controls. It allows you to focus on specific note ranges, practice in various key signatures, and review missed notes to enhance your learning.