Keep in mind that the values those apps give for coins are always wildly incorrect. They will identify them, but so far no app will reliably grade them.
Came here to say this. I used one of the leading apps to identify and value some stamps I have. The app said my stamp was worth over $100. In reality, it's worth about 5 cents.
“Keep in mind that the values those apps give for coins are always wildly incorrect. They will identify them, but so far no app will reliably grade them.”
Ditto what Fluffy said.