The paid version of the app is a separate app, not an in-app purchase. To get the ad-free version, you need to download the Pro version from the App Store or Google Play. Look for an app with a "+" symbol in the icon, or search for the app name followed by "Pro".
Yes! Feel free to send an email with the verb you would like to see.
You can export your favourites in the free app (via the settings page) and then import them in the paid app. I hope to make this process more seamless in the future.
Yes, of course! Feel free to send an email with your suggestion..