Another HNer and I have created an app for knitting and crochet, with customisable counters, pattern import in many format, possibility to annotate, draw on pattern... as well as other knitting & crochet tools (chart creator, unit converters, glossaries, swatch adaptor...). If you want to give it a try, your feedbacks are very much welcomed, especially as you are already using an app for knitting. https://rowcounterapp.com/