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Flexible server monitoring

Introducing Simon 5!

Simon version 5 is now available. 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 is a paid upgrade from Simon 4. Purchasers since September 1, 2020 automatically get a version 5 license (that also works in previous versions).

Read the Simon What's New page for details.

What do the status icons mean, and can I just make it green and red?

By default, Simon uses time-sensitive status icons to indicate whether tests are successful, a failure, or recovered.

These icons start off as gray upwards-facing triangles, which turn bright green () when a change occurs, and gradually fade through shades of green back to gray over time if no further changes occur. If a failure occurs, a red downwards-facing triangle () is used. When the test recovers from the failure, an orange upwards-facing triangle () is used, which also slowly fades back to gray over time.

These icons provide a lot of useful information just from their colors. But if you'd prefer to keep things simple, you can do so. Go to the General Preferences, and choose the Use simple status icons option. That will make Simon display a green icon when the test is successful, or the bright red icon when it is failing.