Also found free hand to be difficult, especially for moving targets like animals, I'd invest in an adapter that allows for x y and z adjustments and allows for easily taking out and replacing your phone for when you actually just want to use your binos with your eyes. Celestron makes some decent ones that shouldn't break the bank
I've tried some of the cheaper two axis ones and have abandoned a lot of photo ops because of the difficulty in realigning when I take my phone off