Most monitors tell you the internet is down right now. UptimeLogger is built for the argument afterwards: it records every outage and exports a PDF report for the conversation with your ISP.
Different: it runs on Windows and macOS (the tool that inspired it is macOS-only), and it uses TCP to several DNS resolvers by IP rather than ICMP pings - no admin rights, and a broken name lookup is not read as a dead line.
No account, no telemetry, local database.
