This app is a scam.
I downloaded the app for €1.00 and paid with Apple Pay. Shortly afterward, I was charged €14.99 and €49.99 without my authorization.
These charges appeared on my bank account as bank transfers, making it look as though I had initiated the payments myself. Because of that, I was unable to request a refund through the App Store, where refunds are normally possible.
To make matters worse, these payments were not shown as a subscription in the App Store, so there was no option to cancel or manage them.
I have been unable to recover my money. Both my bank and Apple told me they could not help because the payments did not appear as App Store subscriptions.
Be extremely careful before downloading this app. Based on my experience, I strongly advise others to avoid it.