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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).

Read the blog for details.

Where is the Simon data stored on my computer?

The data is stored in a folder within your Application Support folder. The preferences are stored in your Preferences folder, naturally. The locations are as follows, where "~" means your home directory:

"~/Library/Application Support/Dejal/Simon/"
"~/Library/Preferences/com.dejal.simon.plist".