Compare software

Website MonitorNightbell
Free

Free and open source under the GPL-3.0 licence.

 Free

Free and open source under the Apache 2.0 licence.

Android Android
  • Supports per-site monitoring intervals
  • Can notify for selected HTTP status codes
  • No server or account needed
  • Tokens and history stay on the device
  • Available for Android only
  • Checks only run while the phone is on and connected
  • Not available on Google Play
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: Apache-2.0
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 8, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.