I have tested several barcode readers, and this one is the best because you can customize it. As a developer, I send results to an API server, which is usually found in expensive apps that charge monthly. Support is awesome! I had a few questions and sent an email, and I got an immediate response, which is uncommon when dealing with developers. And the best part, this baby is fast! They have done a great job with the auto-focus. I barely have to put my phone over the QR code and its done. And finally, NO ADS!!!