Most uptime monitors page you for a blip. Last Seen Up confirms a failure over consecutive checks before an incident opens, collapses a flapping monitor into one notification, and stays quiet during maintenance windows. When it is real, it reaches you: a push, a live countdown on your iOS lock screen you acknowledge in one tap, then a phone call if nobody answers. Seven checks — HTTP, TCP, ping, DNS, SSL expiry, domain renewal, and heartbeats for cron jobs. Free for 3 monitors.