I’ve searched for a while to find the best digital makeup app, YouCam is the best one that I could find on the App Store. I like that the main goal of the app is makeup, you can automatically or manually set points on your photo to make it as realistic as possible. They give you lots of different shades and styles to create many different combination of looks. They also have an editing feature, where you can edit your hair color, change your hair style. You can add clothing, effects or accessories.
There is a social part of the app too, where you can share and post photos and interact with other users!
I only use the free version, but there is an option for a paid subscription where you can get access to a lot of premium features.