Peak Flow Meter，Portable Peak Flow Meter Test PEF & FEV1 for Kids Adults Asthma COPD & Other Lung Conditions Monitor, Tracking App Bluetooth Connection with 300 Records Storage Function

As expected. Get it.

Didn’t use the app for phone but device is easy set up with clear results

The peak flow meter is very simple to use. I charged it for two hours before using as it said to do in the directions. As soon as you turn it on and the screen says 'go' it's ready to use. Take a deep breath, blow as fast and hard as you can into the mouthpiece and the reading is instant, signified by two beeps. After you take three readings, the average is supposed to be your current level. There is an app that you can put on your phone to keep track of your readings, and I think the device stores 300 readings. My only issue is with the expiration date on the device. The one I received expires in only two years.

Pretty accurate! The numbers my son got from this are the same as the numbers he got at the doctor’s office.

Values did not come close to hospital tests.

Recomiendo. Es útil y practico

Did not realize how badI was or the accuracy of this meter. Measurement are excellent

The device itself is nice and captures all the necessary data for tracking your peak flow of breath. This doesn't get five stars because the device fails to connect to the app via Bluetooth. That said, it does allow me to input my data manually and track it via the app by graph and statistics. This is a good device for anyone with compromised lung capacity, asthma, COPD, etc. If the app connected and synchronized my data the way it is advertised, then I would give it a higher rating for sure. Other than that, I'm happy with the performance.