Avatar Maker: Girls is a character creator rather than a game with a win condition. You build a portrait from a large library of hairstyles, facial features, expressions, outfits and accessories, mixing pieces until the result looks like whatever you had in mind.
The appeal is the breadth of options and the fact the features are animated, so the character has a bit of life to it. People use these to make profile pictures, character designs and doodles of their friends.
Yes — most builds offer a save or download button, and a screenshot always works as a fallback.
No — it's a creative tool rather than a game with objectives. The point is designing a character you like.
Yes — tap to change options. Nothing to install.