I think there’s one here on Tarot Guru is there not?
Personally I don’t mind Tarot reading apps for a digital version of your cards or a handy reference but I don’t like the idea of just using a computer to tell you what the cards (or the reading) means.
Takes away from the intuition and the whole point of the reader.
If you’re not sure how to read your cards, post them here and let a real human help you read them. Much better.