This is cool but
Response from developer
Thank you for the feedback, and sorry for the frustration! In older versions the only way to unlock Pro on iPhone was watching an ad, and ads aren't always available in every region. Since version 1.9, Pro is a one-time purchase in the app, so you can unlock all Pro features without waiting for an ad. Please update to the latest version, and if anything still doesn't work, write to us from the app's "Report a problem" screen. We read every message.


