Both versions are the same app and have the same features.
- The ‘Pro’ version is a paid app in the App Store.
- The ‘non-Pro’ version is a free app version in the App Store.
The free app version limits the amount of tasks and gives the opportunity to test-drive the app before you buy it.
Upgrading the free app version to Pro from within the app (In-App Purchase) removes all the limitations from the free app version.