About Clefs
Clefs is a compact education app from Crazy Ootka Software AB, built for learners who want a focused study tool on a phone or tablet. The listing identifies the build by the package name com.crazyootka.clefs, so you can confirm you are looking at the right release before installing.
What the listing tells you This page covers the essentials of the app: it belongs to the education category, it is published by Crazy Ootka Software AB, and it is distributed under the Clefs name. The package identifier is the most reliable way to match the file on your device with the entry you are reading, especially if you keep several study apps installed at once.
A small, quick install The download is 3.9 MB, which is a light footprint for an education app and leaves plenty of room for other tools. That small size usually means a short wait on a mobile connection and a fast handover to your device, without a long installation step or a large temporary footprint during setup.
Device requirements The build requires Android 8.1+ or newer. Devices running that release or a newer version of the platform should be able to install it, while older handsets that fall below the requirement will not. As with any education app, keeping your device updated helps the software behave consistently.
Version and release details The current build listed here is version 1.0.55, published on 2026-10-03. Version numbers like this are useful for checking whether the copy installed on your device matches the latest one shown on this page. Note that the content rating for this app is marked as unknown, so no age classification is given in the listing.
APK Information
- Version
- 1.0.55
- Size
- 3.9 MB
- Android
- 8.1+
- File type
- APK
- Updated
- Oct 3, 2026
- Package
- com.crazyootka.clefs
- Developer
- Crazy Ootka Software AB
Features
Education App
Compact Install
Crazy Ootka Software
Frequently Asked Questions
Which Android versions can run Clefs?
The build requires Android 8.1+ or newer. Any device already running that release or a more recent version of the platform should be able to install the app. Handsets below that requirement will not be able to complete the installation, so it is worth checking your device's system information before you begin.
How much storage does the app need?
The download is 3.9 MB, so it is one of the lighter entries in the education category. That figure covers the file itself; your device will also keep some working space free during installation. Because the app is small, it is a practical choice if your phone or tablet is already short on free space.
What version and release date does this listing show?
The latest version listed here is 1.0.55, published on 2026-10-03. Comparing this version string with the one reported on your device is the simplest way to confirm you have the current build rather than an older copy left over from an earlier install.
Who develops the app and what category is it in?
Clefs is published by Crazy Ootka Software AB and is filed under the education category. The package name com.crazyootka.clefs is the unique identifier for this app, so you can use it to verify that a file matches this listing before installing it on your device.
Does the listing give a content rating?
No. The content rating for this app is shown as unknown, so no age classification is provided on this page. If a rating matters for a shared or supervised device, you will need to judge suitability yourself or check the rating shown by your own device's system settings.
