Last Seen Up

About

Last Seen Up distinguishes itself from typical uptime monitors by avoiding alerts for brief interruptions. It verifies a failure through multiple consecutive checks before initiating an incident, consolidates repeated alerts into a single notification, and remains silent during scheduled maintenance. When a genuine issue is confirmed, it ensures you are reached with a push notification, a live countdown on your iOS lock screen that can be acknowledged with a single tap, and follows up with a phone call if there is no response. It supports seven check types: HTTP, TCP, ping, DNS, SSL certificate expiry, domain renewal, and heartbeats for cron jobs. The service is free for up to three monitors.