This is the closest you will get to a free, high-quality experience.
Team Cherry is a small team (three core developers). They are currently fully focused on Silksong (the sequel). Porting Hollow Knight to iOS would require: hollow knight ipa free better
It is unlikely to happen soon. That is why the "free better IPA" remains a dream. This is the closest you will get to
Even without an official app, you can stream the game to iPhone/iPad: It is unlikely to happen soon
If the above sounds too risky, accept that you cannot play Hollow Knight for free on iOS natively. But you can play it better and cheaper by: