How to Download Twitterrific (iOS and macOS)

Is Twitterrific free or paid and where can I download it?

iOS

Twitterrific for iOS is free to try with several advanced features such as push notifications, tweet translation and ad removal offered as in-app purchases. Download Twitterrific for iOS from the App Store.

Mac

Twitterrific for macOS is a paid only application available for download from the Mac App Store.