BaconReader pro for Reddit - something I used to use on Android that I bought for my iPhone when I switched over as I’m used to it.

Unified Remote (iAP purchase to full) - another Android app I used to use to remote control computers with my phones touchscreen using the unified remote server. Great for HTPC setups.

Vinegar extension for Safari - found out about this on this subreddit. Used to use NewPipe on Android for listening to YouTube videos in the background and after seeing all the praise that Vinegar got on this sub, bought it for my iPhone and iPad to do exactly that with it. Blocks ads, enables seamless background playback so it’s a perfect replacement for my old NewPipe usage.

FL Studio Mobile - GarageBand is great but I simply prefer the way Fruity Loops Studio Mobole works on iOS and iPad Os. The fact that Image Line let you use any sound packs bought on Windows and Android across all devices is great too.