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Kepler-App

App only in German! - App for the JKG Chemnitz with all important info
Warning! This app is only available in German. There are no translations available.
Changelogs are only offered in German.

The Kepler app is the ultimate overview app for all JKG students, parents and teachers. It offers many functions that not only provide information about everyday school life, but also allow direct access to all the information you need:

- Substitute schedule view with interesting and helpful overviews, such as:
- Your timetable (with class and subject selection)
- Class plans
- Room plans
- Free rooms
- for teachers Teacher plans and supervision information
- Kepler news overview and calendar with important school events
- LernSax integration to check new notifications and emails with one tap
- Notifications to be informed about timetable changes and new Kepler news as quickly as possible

Data protection is also a high priority: all data, such as emails or timetables, are only stored locally.
In addition, all these functions only require a one-time login with your own LernSax account.
  • app screenshot
  • app screenshot
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  • app screenshot
  • app screenshot

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 2.16.0 (84) suggested Added on Jun 22, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • run foreground service
      Allows the app to make use of foreground services.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • Schedule precisely timed actions
      This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • de.keplerchemnitz.kepler_app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 65 MiB PGP Signature | Build Log

  • Version 2.14.0 (82) - Added on May 11, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • run foreground service
      Allows the app to make use of foreground services.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • Schedule precisely timed actions
      This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • de.keplerchemnitz.kepler_app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 62 MiB PGP Signature | Build Log

  • Version 2.13.1 (81) - Added on May 02, 2025

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 6.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • run foreground service
      Allows the app to make use of foreground services.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • Schedule precisely timed actions
      This app can schedule work to happen at a desired time in the future. This also means that the app can run when you're not actively using the device.
    • control vibration
      Allows the app to control the vibrator.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • de.keplerchemnitz.kepler_app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 62 MiB PGP Signature | Build Log

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