Simon 5 is coming soon!
Simon version 5 is currently in beta testing. It is a massive update, introducing a much-requested feature: syncing the Simon data between multiple Macs, plus a Simon Status service, a Link Checker filter, improved Find filter, iMessage and Speak Error notifiers, a new app icon, and much more.
Important: please note that Simon 5 requires a minimum of macOS 10.12 (Sierra), and will be a paid upgrade from Simon 4 after the beta. Purchasers since September 1, 2020 automatically get a version 5 license (that also works in previous versions).
Re: Non-linear up/down time
Hi Tom,
The "uptime" is the ratio between successful and failed checks. As you point out, if Simon isn't constantly monitoring, and it happens to see a higher proportion of failures, that'd skew the ratio.
Also, Simon gives you the option to specify a different check frequency when the previous check was a success or a failure. So checking more often during failures can also skew the ratio. So if the uptime ratio is important to you, you should make the check frequencies equal.