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SignalSense – Network Switch Alerts

Know the instant your network switches between 5G, 4G, 3G, or 2G
New in version 1.0.0
Initial release of SignalSense.

• Real-time 5G / 4G / 3G / 2G network monitoring
• Instant notifications on network transitions
• Live speed and ping display
• Full switch history log
• Customizable alert triggers
• Auto-start / auto-stop with mobile data
• Boot auto-start support
• Dual SIM slot selector
• No ads, no tracking, fully open source
Frustrated by silent drops from 5G to 4G? SignalSense alerts you the instant your network changes – giving you the power to pause downloads, save your data, and avoid unexpected charges.

SignalSense continuously monitors your mobile network and notifies you whenever your connection switches between 5G, 4G, 3G, or 2G – helping you identify network issues before they affect calls, streaming, gaming, or downloads.

FEATURES

- Instant Alerts
Get notified the moment your network drops from 5G to 4G, or 4G to 3G. Stop wondering why your video buffered – know exactly why.
- 5G SA and NSA Detection
Accurately distinguishes between 5G Standalone (SA) and Non-Standalone (NSA) connections – not just "5G".
- Custom Ringtones & Vibration Control
Choose your own custom ringtone and control vibration settings for network alerts.
- Live Speed and Ping
See real-time download and upload speeds in the persistent notification, and live ping on the home screen.
- Call-Aware Alerts
Alerts are automatically held during active phone calls and fired after the call ends. No interruptions at the wrong moment.
- Anti-Spam Debouncing
Rapid signal fluctuations are detected and grouped into a single "unstable signal" alert instead of spamming your notification shade.
- Switch History Log
Every network change is logged with a timestamp and network speed. Review your full connection history at any time.
- Fully Customizable Alerts
Choose exactly which transitions alert you:
- Network Upgrade
- Network Downgrade
- Mobile Data Lost / Restored
- Any Network Change
- Smart Auto-Start / Auto-Stop
Monitoring can automatically start when mobile data turns on and stop when it turns off – completely hands-free.
- Boot Auto-Start
Optionally start monitoring automatically every time your phone boots.
- Dual SIM Support
Choose which SIM slot to monitor or use Auto mode to always follow your active data SIM.
Switches instantly when you change your default data SIM.
- Battery-Friendly
Uses a lightweight foreground service with minimal battery impact. Built for all-day use.

No ads. No tracking. No data collected. 100% private and open source.
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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 (1) suggested Added on Jun 22, 2026

    This version requires Android 8.0 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.
    • view Wi-Fi connections
      Allows the app to view information about Wi-Fi networking, such as whether Wi-Fi is enabled and name of connected Wi-Fi devices.
    • change network connectivity
      Allows the app to change the state of network connectivity.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "dataSync"
      Allows the app to make use of foreground services with the type "dataSync"
    • 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
    • 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.
    • prevent phone from sleeping
      Allows the app to prevent the phone from going to sleep.
    • com.signalsense.app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 2.2 MiB PGP Signature | Build Log

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