@jackbrewster I ended up hacking together a command-line tool in Python because I didn't like the way that Anki punishes you for not keeping up with it. "Intervals" are by number of reviews and new cards appear when you run out of reviews. Text only of course. Should work on any platform with Python, which apparently includes iOS, dunno if modification needed there. Probably not what you're looking for (and the code is a mess so I'd feel awkward sharing it), but figured I'd offer in case.
@madewokherd I appreciate this, but yeah, I’m looking for something low-lift.