Nuleen does not collect any personal data from its users. If no data is collected, it can't be stolen, demanded, or leaked!

What the app keeps, your scores, favorites and settings, and the rare puzzles it builds after the first launch, stays on your device and is never sent anywhere. Deleting the app deletes it.

As Nuleen is distributed through Apple's App Store, you may want to read their Apple Consumer Privacy Policies.