Are iOS, Mac, and Android licenses sold separately?

Yes. Each app is sold separately:

• 2Do Mac is purchased from our store, the Mac App Store, or Setapp.
• 2Do for iPhone and 2Do for iPad are separate apps on the App Store, each a one-time purchase.
• 2Do Android is a free download on Google Play, with an optional Pro upgrade.

Buying one of them does not automatically unlock any of the others.