Looks like you can get a lifetime of Kitsun for about 14 months of iKnow. What is iKnow, a library of pre-made decks build into scheduled courses?
I’ve only made my own decks within Kitsun though the pre-made decks appear to be high quality and well made. For making decks, it’s the easiest I’ve seen. The default layout designs are very simple to use and the Jisho card generator makes it very convenient to add new words and ton of synonyms. If you are creative deck builder, there are plenty of custom layout options to play with. I haven’t used the sub2kitsun but it appears more convenient to use compared to anything else on the market. The productive input (via WK styles and/or KameSame style) personal vocab lists is really what got my attention as a superior learning method compared to some non-input opinion polls (though I’ve used non-input for some special decks if I just want a classic flashcard format). And if you really want to use Anki content, you can upload it into Kitsun as well though I had some trouble on a geography deck so some formats may not translate. The browser on mobile has worked just fine for me as well. Neicul is a wizard too and is proactively improving the platform by the minute.