Tap "Premium Service" in the app's Settings screen.
With Premium, ads are no longer shown, and you can use the app ad-free while your subscription is active.
Premium is a monthly or yearly subscription that renews automatically until you cancel.
If you purchased the one-time "Remove Ads" option in an earlier version, that purchase remains valid. You can keep using the app without ads at no extra charge, even without subscribing.
If ads appear after changing your device or reinstalling the app, tap the "Restore Subscription" button in the Settings screen.
As long as you use the same Apple Account, ads will be hidden again without paying twice.