Clefs: Music Reading Trainer

Name: Clefs: Music Reading Trainer
Rating: 4.48 (3886 reviews)
Author: Crazy Ootka Software AB

By: Crazy Ootka Software AB

Your ultimate guide into the language of music.

Features & Capabilities

Clefs: Music Reading Trainer is your ultimate guide to understanding and mastering the language of music. Whether you're curious about treble or bass clefs, sight reading, or how to write music on the stave, this Chrome extension offers comprehensive learning through over 200 lessons arranged in seven progressive chapters. Each chapter includes introductory theory and exams to solidify your knowledge.

Beyond lessons, Clefs offers a powerful custom lesson editor to tailor exercises to your needs, daily personalized exercises, detailed statistics tracking your progress, and support for MIDI keyboards to practice sight reading interactively. The simple, beautiful design adapts to light and dark themes, making your learning experience comfortable. Developed by the creators of Perfect Ear, a highly rated music education app, Clefs is perfect for musicians eager to enhance their music reading skills effectively.

User Growth & Download Statistics

App Education Music & Audio

By:

Crazy Ootka Software AB

Downloads:

826,802 1.45K

Rating:

4.48

(3,886) 3 new ratings

Version:

1.0.51 Last updated: 2025-07-03

Version code:

Creation date:

2020-09-10

Publisher country:

Permissions:

android.permission.BLUETOOTH_CONNECT Moderate risk
android.permission.ACCESS_ADSERVICES_AD_ID Low risk
android.permission.ACCESS_ADSERVICES_ATTRIBUTION Low risk
android.permission.INTERNET Low risk
android.permission.POST_NOTIFICATIONS Low risk
android.permission.RECEIVE_BOOT_COMPLETED Low risk
android.permission.WAKE_LOCK Low risk
com.android.vending.BILLING Low risk
com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE Low risk
android.permission.ACCESS_NETWORK_STATE Safe

Size:

5.96MB

Email:

su*****@clefstrainer.app

URLs:

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-05

Compare stats and ranking:

Ranking

# 74,506 ▼ 149

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

Crazy Ootka Software AB

Google Play Store

https://play.google.com/store/apps/details?id=com.crazyootka.clefs

Email:

su*****@clefstrainer.app

User Reviews

Users praise Clefs as a strong, easy-to-use tool for improving sight-reading and clef knowledge, especially for daily practice. It covers multiple clefs and is largely free and ad-free. Key concerns revolve around premium features gating (bass/extra clefs) and occasional account issues after upgrading. Some feature requests (Grand Staff, more input options) appear, but overall the app is viewed as highly useful with room for smoother premium handling and feature expansion.

Pros

Effective for refreshing clef knowledge and relearning sight-reading
Helps users learn notes and improve reading skills
Encourages a daily practice habit and keeps note-reading sharp
Easy to understand and beginner-friendly
Free to use with an ad-free experience and support for multiple clefs (treble, bass, alto, tenor)

Cons

Premium gating and occasional account issues after upgrading (bass/extra clefs require premium; some users experienced downgrades or slow support)

Recent reviews

Love using this app. Makes learning sheet reading so intuitive. Would love to see a section for chords as well, I'm really bad at reading chords would be great for practice too. Buying full app is 100% worth it.

Ar*****, 2026-05-04

Thank youuuu sooo soooo muchhhh, was a good app, I've learned how to read notes

Ju*****, 2026-04-27

I tried this out and liked the interface. I even bought this because I was getting better! The dragging to the stave is a frustration however because fingers are big, but did get me familiar with octave notation. As I got further into using the app, I noticed that the ledger lines above and below are not drilled above or below 1-2 spaces. This was a bit of a deal breaker since I am especially weak in reading these notes. Also I did not see an option for syncing across devices.