ServerCheck

ServerCheck is a lightweight and reliable server & website monitoring app designed for developers, sysadmins, and anyone who needs to stay on top of their infrastructure.
Monitor unlimited HTTP/HTTPS websites and Ping servers — all running silently in the background, even when your phone is in deep sleep. The moment a server goes down, you get an instant notification. When it recovers, you get notified again.
ServerCheck is smart about your internet connection. If your own internet goes down, it detects that separately and pauses server alerts so you don't get flooded with false alarms. As soon as your internet is back, it resumes monitoring and gives you a full status update.
FEATURES
• HTTP and Ping monitoring
• Instant down and recovery notifications
• Internet outage detection — no false alarms
• Background monitoring with Alarm Manager — works through Doze mode
• Response time tracking
• Full history log for every monitor
• Import and export your monitor list
• Dark and light theme
• Minimal battery usage