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.
I could never prove the outages I was complaining about, so I wrote this. It records every interruption, shows a year of history as a calendar heatmap, and exports a PDF report for the conversation with your provider. Free, no account, no telemetry, everything stays in a
local database. The source is not published and 0.1 is not code-signed — both systems warn once on first launch - working on that.