FCM Status 1.9

FCM Status 1.9

• Refined Status and Settings UI
• Added Battery optimization and Autostart guidance
• Added Google Play Services version information
• Improved FCM reachability and heartbeat status reporting
• Updated README documentation and screenshots
• No root required

FCM Status 1.8

FCM Status 1.8

• Added connection testing after each heartbeat
• Added Retry action beside the connection status
• Updated the launcher and notification icon concept
• Updated the README screenshot
• Status checks the primary mtalk.google.com:5228 transport

v1.7 - FCM Status Checker

FCM Status Checker v1.7

Android diagnostic app that checks FCM server reachability and provides a configurable keep-alive heartbeat service.

What's new in v1.7

• Alarm clock Doze piercing - heartbeat now uses setAlarmClock on Android 12+ for better reliability in deep sleep
• Notification icon fix - dedicated white bell icon for the status bar instead of the clipped launcher foreground
• PNG launcher icon fallbacks - raster icons in all density buckets so the launcher never shows a blank icon
• Probe generation counter - rapid re-check taps no longer flash stale results

Checks performed

• FCM server reachability (mtalk.google.com on ports 5228, 5229, 5230, 443)
• Google Play Services availability & version
• Notification status & POST_NOTIFICATIONS permission
• Network state (Online/Offline, connection type including VPN)
• Device model and Android version

Keep-Alive Heartbeat service

• Configurable interval (1-10 minutes)
• Foreground service with ongoing notification
• Self-rescheduling alarm that pierces Doze
• Battery optimization exemption helper
• Survives reboot
• Direct launch of GCM FCM internal diagnostics

Build

• Min SDK 26, Target/Compile SDK 35
• Plain Java, no Firebase project needed