I don't know off the top of my head, but I did a search in here the results.
- https://collider.com/movies-shot-on-iphones-ranked/
- https://fictionhorizon.com/films-that-were-shot-entirely-on-phones/
- https://en.wikipedia.org/wiki/List_of_films_shot_on_mobile_phones
I thibk the ones I had heard of were Tangerine and maybe the Stephen Soderberg ones.