> it works, but its slow, clunky, and error prone.
Interesting assessment. I use it almost daily, and I have no issue with it whatsoever (macOS <-> iOS <-> iPadOS). Sync works absolutely flawless. UI is not modern and it's a bit slow with Rosetta, but stable and fast enough to add and edit cards. Copy and paste of images works ... stats are okay. And, the most important part, the algorithm just works well for me.