Know a good animation software for IOS smartphones? (Patreon)

I like my macbook and tablet setup but it isn’t convenient to carry around. I have sketchbook apps on my phone for doodling (or occasioanlly doing full scale drawings if I have the time and am away from my place for a while). I do want to try making animations on my phone at some point so I can at least get ideas drawn out. Anyone have experience with an app available on IOS that is good for animating?