# Keys Trainer — Master Key Signatures & Scales > Music app for mastering key signatures and scale identification. (iPhone/iPad app by Plearn LLC.) - Source: https://appshunter.io/ios/app/keys-trainer/id1525979034 (this page in markdown: same URL + `.md`) - Developer: [Plearn LLC](https://appshunter.io/developer/6792172523) - Category: Music, Education - Price: $2.99 - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 30 MB - Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France) and 34 more - Released: 2020-08-30 - Data updated: 2026-08-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/keys-trainer/id1525979034/reviews.md ## What is Keys Trainer? Do you want to be capable of recognizing the key signatures at first sight? That is, when you see a key signature, you know what key it is and what notes should be sharp or flat immediately. Do you want to have the ability of instantly identifying the scale layout on a piano/keyboard for a given key? If your answer is yes, check out this app. It can help you acquire these skills which can definitely benefit your music learning and piano playing. Main Features: • Practice Mode You learn at your own pace simply by answering the question, and if you are wrong, the correct answer will be shown for the duration of your choice. • View Mode You don’t need to do anything but watching, the questions and answers will be shown automatically after the delay of your choice. Good for lazy people like me. • Game Mode In this exciting countdown mode, you can challenge yourself and earn as many coins, medals, and trophies as you can. • Search Mode This mode allows you to look up the keys by name, key signature or keyboard. • Learning Range Customization You can customize your learning range sot that you can focus on improving your weaknesses. • Intelligent Training Each question is generated intelligently based on the statistical information of your performance so that it can turn your weaknesses into strengths. ## Key features - Key signature recognition - Scale layout identification - Customizable learning range - Intelligent training based on performance - Practice, View, Game, and Search modes - Earn coins, medals, and trophies ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/keys-trainer/id1525979034/reviews.md ### 3/5 — Приложение не понравилось! *2020-10-18* Своих денег не стоит... **Developer response:** Спасибо за ваш отзыв. Мне жаль слышать, что вы не удовлетворены этим. Я просто хочу сообщить вам, что в это приложение будет добавлено больше функций. Надеюсь, вам это понравится. ## Frequently asked questions about Keys Trainer ### What is Keys Trainer? Keys Trainer is a music education app designed to help users master key signatures and scale identification on a piano or keyboard. It offers various modes for learning and practice. ### How does Keys Trainer help me learn? Keys Trainer offers a Practice Mode for self-paced learning, a View Mode for passive observation, and an intelligent training system that adapts to your performance to strengthen weaknesses. ### Can I customize my learning in Keys Trainer? Yes, Keys Trainer allows you to customize your learning range. This feature enables you to focus on specific areas where you need the most improvement. ### Does Keys Trainer have ads? No, Keys Trainer does not contain advertisements. It is a paid application that offers an uninterrupted learning experience. ### What devices is Keys Trainer available on? Keys Trainer is available on iPhone, iPad, and iPod. It is designed for Apple mobile devices. ### How often is Keys Trainer updated? The latest version of Keys Trainer is 1.1, last updated on May 9, 2026. This indicates a recent update, suggesting ongoing support and development. ### What is the age rating for Keys Trainer? Keys Trainer has an age rating of 4+. This means it is suitable for users aged 4 and above. ### What are the different modes in Keys Trainer? Keys Trainer includes Practice Mode for active learning, View Mode for passive observation, Game Mode for challenges with rewards, and Search Mode to look up keys. ## Version history (last 5 releases) ### 1.1.1 — 2026-07-31 Minor improvements ### 1.1 — 2026-05-09 Turn on Diatonic Modes in Settings to practice the seven diatonic modes (Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian) together with major and minor. ### 1.0.2 — 2021-12-12 • Optimized for iOS 15 ### 1.0.1 — 2020-09-06 • Added new version checking ### 1.0 — 2020-08-30 No release notes. ## Apps similar to Keys Trainer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Melodician](https://appshunter.io/ios/app/melodician/id6744869240) | — | Free | Music | | [Music Theory Keys •](https://appshunter.io/ios/app/music-theory-keys/id1017426995) | 3.3 (4) | $0.99 | Music | | [Music Theory Advanced](https://appshunter.io/ios/app/music-theory-advanced/id511632736) | — | $4.99 | Music | | [Rando! Chord Generator](https://appshunter.io/ios/app/rando-chord-generator/id6760557132) | — | Free | Music | | [FretSketch](https://appshunter.io/ios/app/fretsketch/id6752662475) | 5.0 (1) | Free | Music | ## More apps by Plearn LLC - [Music Note Trainer](https://appshunter.io/ios/app/music-note-trainer/id1023154291) - [Chords Trainer](https://appshunter.io/ios/app/chords-trainer/id1117197465) - [Flying Beat - Rhythm Trainer](https://appshunter.io/ios/app/flying-beat-rhythm-trainer/id1247294026) - [Solfege Trainer](https://appshunter.io/ios/app/solfege-trainer/id1371244853) - [Music Intervals Trainer](https://appshunter.io/ios/app/music-intervals-trainer/id1462595160) All apps by Plearn LLC: https://appshunter.io/developer/6792172523 ## Related topics [key signatures](https://appshunter.io/ios/topics/key-signatures) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*