Hey there thanks for the reply; The funny part is that the App Store's link led me straight to the SwiftKit forums here on tip.it, although I had previously contacted the developer with the same link, but that led me to an email address. This means the developer has gone inactive and/or swapped their professional email address for a forum link. A pretty disappointing answer to my question. Great.
I used the mobile app for years, but now it's downright unusable. Hiscores fetching is broken, a lot of newer content is missing, several features are just completely broken. Paying customers at least deserve an update – last one was in 2016. Thank you :-)