Scam
It doesn’t work at all. Every image is “unclear” despite being in perfect focus with excellent lighting.
Response from developer
We hear you — and you're right, an earlier version had a critical bug that broke scanning for everyone. It's fixed now in 1.1.3. Give it a try. As a thank you for your patience, we'd like to give you a free copy of our other app, Juicy Melons. Email us at support@avocadabra.co and we'll take care of you.