I have seen a few posts over the last 3 years requesting these features for Anki Mobile. Have they by any chance sneaked up near the top of the priority list? I did see some discussion with the Anking, but seems too complicated to try and do myself.
Would make a huge difference in how many study. Thanks!
AnkiMobile does not come with any built-in user JS actions, but you can copy a script that adds one in to your card template, like as seen here: Hint reveal on iOS gamepad?