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Keep SIM Alive

Scheduled keep-alive SMS so prepaid, roaming or backup SIMs stay active
New in version 1.0.0
First public release:
- Per-SIM keep-alive schedules
- Send history
- Automatic retries
- Off-schedule manual sends
- English and Russian
Keep SIM Alive sends an SMS on the schedule you define so your prepaid, roaming, or backup SIM card is never deactivated for inactivity.

How it works

For each SIM on the device you set a recipient, a message, and a schedule for when the message goes out. Each keep-alive is a regular SMS: your carrier may charge for it as per your plan.

Features

  • Dual-SIM device support

  • Fixed send time or a random window

  • Off-schedule manual send

  • Send history with per-message outcomes

  • Automatic retries if network is down or the SIM is removed

  • Live SIM status to clearly identify the SIM

  • Schedule per SIM card and not per slot, so the schedule follows the SIM

  • Optional sticky notification while keep-alive is on

  • Survives reboots and app updates



Privacy

The app has no internet permission and makes no network calls: keep-alive messages are sent directly over the cellular network and all data stays on your device. No advertising, no tracking, no analytics.

Permissions

  • Send SMS — the keep-alive message itself

  • Read phone state — to properly link the schedule to a certain SIM card

  • Show notifications — recommended for sticky notification

  • Boot completed — to re-arm the schedule after a reboot

  • Ignore battery optimizations — optional but recommended, for reliable wake-ups

  • Schedule exact alarms (Android 12+) — optional and experimental, for wake-ups despite aggressive battery optimizations; recommended on devices known to kill background apps. On Android 12-14 you grant it via a separate Alarms & reminders toggle, and on Android 15+ the battery exemption above grants it automatically


  • app screenshot
  • 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 1.0.0 (1000000) suggested Added on Oct 16, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 7.0 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.
    • show notifications
      Allows the app to show notifications
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • 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.
    • ask to ignore battery optimizations
      Allows an app to ask for permission to ignore battery optimizations for that app.
    • 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.
    • send and view SMS messages
      Allows the app to send SMS messages. This may result in unexpected charges. Malicious apps may cost you money by sending messages without your confirmation.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • app.kotowski.keepsimalive.vanilla.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.5 MiB PGP Signature | Build Log

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