I think you can set up Sight Words Ninja. It has audio of a word and words float on the screen and the child slices/swipes the word tht matches the audio. You can control settings such as how many words are shown at a time.
Not an educational app, but still one that can't be gamed: Stack. My whole family likes it. From 3 year old to my husband. It is hand-eye coordination game. Also sneaks in counting and number recognition for kiddos who could use some practice but don't do it willingly. Might be too "young" for your daughter, but might be a game you can leave her that you don't have to supervise.
