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Clefs icon

Clefs

1.0.52
4 1 reviews
90 downloads
security security

Master reading and writing sheet music with interactive lessons

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Information about Clefs 1.0.52

Basic information

Developer Crazy Ootka Software AB
License Free
Category Education
Rating +3
Languages English
4 more

System requirements

Operating System Android
Architecture universal
See more variants

Security and privacy

Required permissions
See 17 permissions
Advertising Not specified
Certificate signature 0549eca5b4b859c4ccdd248d33f5d184
See security and antivirus report
Why is this app published on Uptodown? (More information)

Download info

Downloads 90
Date Nov 10, 2025
File type XAPK
Size 3.1 MB
SHA256 83196534c9f1b03b469a7f5e760a04add95ba2fe39f5274d7ff2c7928b4d53f0

Technical details

Package Name com.crazyootka.clefs
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What's next?

By clicking "Download," you'll get our official app installer to automatically download Clefs.

How to install this app on your Android device Ver más
XAPK XAPK - Installation using the Uptodown app Ver más
ℹ️ By default, we distribute XAPK files bundled with our official Android app to ensure proper installation, since Android does not recognize this format on its own.

1- Tap Download to get the XAPK file.

2- Once downloaded, locate it in your notification bar or Downloads folder, then tap to begin installation.

3- If this is your first time using Uptodown, you may see a message asking you to enable installs from unknown sources for our official app. To do this, tap Settings in the pop-up and turn on Grant permission.

Enable unknown sources in the Uptodown app

4- After our official app is installed, follow the on-screen instructions to complete the installation of the desired app.

XAPK XAPK - Manual installation Ver más
ℹ️ Keep in mind that Android cannot install XAPK files by default. You'll need a package installer that supports them. If you prefer not to use our official app, we also offer APK Installer, our universal installation tool.

1- To download the XAPK file separately, tap All variants located under the Download button.

2- Choose the version you want and tap to download the XAPK file.

3- Locate it in your notification bar or in the Downloads folder, then tap to begin installation.

4- When opening it, choose a package installer and follow the on-screen instructions. Note: You can also unzip the XAPK and manually move the APK and OBB files into your device's file structure, but we don't recommend this process.

Frequently asked questions Ver más
I can't install the app. Ver más
  • Unknown sources not enabled: Allow installation from unknown sources for your browser or the official Uptodown app (depending on where you're downloading) in Settings > Apps. For more details, visit our Help Center.
Enable permissions in the Uptodown app
  • Minimum Android version not supported: Make sure your device meets the minimum Android version listed under Requirements on the download page. Also, check compatibility with the file's architecture under Architecture in the app info.
  • Not enough storage space: Free up space by removing apps or files you don't need. If downloaded via a browser, the APK/XAPK file remains on your device, so you'll need at least twice the installer's file size in free space.
  • Corrupt or incomplete file: If your connection is unstable or slow, the file may not download completely. If the installation fails, try downloading it again.
  • Version conflict: If you already have the app installed from another source with a different signature, uninstall it before installing from Uptodown.
  • Installer permissions: Ensure the app you're using to install (browser, file manager, or Uptodown App Store) has permission to install apps.
The app installs but doesn't work. Ver más
  • Minimum requirements not met: Sometimes apps install even if requirements aren't met, but they may not function properly. Verify that your device meets the RAM, processor, and Android version requirements listed in the technical sheet on Uptodown.
  • Discontinued app: Some apps remain available on Uptodown even if their developers no longer maintain them. Apps with online features may not work. Check the publish date of the latest file or visit the developer's official page.
  • Architecture incompatibility: Some apps require specific architectures (e.g., ARM, ARM64, x86). Check under Older versions to see if one is compatible with your device.
  • Corrupt data or cache: If locally saved app data causes issues, go to Settings > Apps, select the app, and clear cache and data. Back up any important information first.
  • Outdated version: If you installed an older version, the app may require an update. Check Uptodown to confirm you have the latest release.
Older versions

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Older versions

xapk 1.0.51 Android + 8.0 Jul 26, 2025
apk 1.0.47 Android + 6.0 Aug 31, 2025
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