UptimeOwl: Uptime Monitoring for Your Sites and Services, on Android

Your website went down three hours ago. Your server stopped responding. A critical API started timing out. And you had no idea until a user told you. UptimeOwl makes sure you know first.

What UptimeOwl Does

UptimeOwl is a free Android uptime monitoring app that checks your HTTP and TCP endpoints in the background at regular intervals. When something goes down — or comes back up — you get a push notification immediately. Response time data is graphed over time so you can see not just whether your services are up, but how they're performing.

It's designed for developers, sysadmins, and site owners who want simple, reliable monitoring without standing up a full monitoring stack or paying for an enterprise service.

HTTP and TCP Monitoring

UptimeOwl supports two monitor types:

• HTTP monitors — sends a request to a URL and checks the response code. Configure the expected status code (200, 301, etc.) and optional response content matching.
• TCP monitors — attempts a TCP connection to a host and port. Useful for monitoring services that don't speak HTTP — database ports, SMTP servers, custom TCP services.

Most monitoring needs fall into one of these two categories. UptimeOwl covers them both cleanly without overcomplicating the setup.

Push Alerts When It Matters

The whole point of an uptime monitor is knowing immediately when something breaks. UptimeOwl sends push notifications the moment a monitor fails its check, and another notification when it recovers. You can configure monitors independently, so you're only alerted for services where downtime genuinely matters to you.

Response Time Graphs

Uptime is binary — up or down — but performance is continuous. UptimeOwl tracks response times for each monitor and displays them as a graph, making it easy to spot degradation before it becomes an outage. A service that's technically responding but taking 8 seconds to answer is a problem worth knowing about.

UptimeOwl is free on Google Play. No account required — monitors run locally on your device. Search for UptimeOwl and know the moment something breaks.