I bought this particular blood pressure monitor because of the Bluetooth data transfer. It turns out that the app is, as one reviewer put it, a polished turd. It's difficult to set up... There are significant time lags between registering, validating your email, setting up your account, and finally being able to view your data. Don't try to do it all at once. And better yet, skip the smartphone app and use a tablet or a desktop computer. Because, the email the file function doesn't always work. If you go to Omron wellness.com on your web browser you can download the file directly or print it out. But the blood pressure monitor works really nice. I like the cuff, especially because I have a small upper arm.