For those of you that have one that turns off or says fail etc. Its probably your jack on your phone. Mine did that and I hated the damn thing until I finally got a new phone then I loved it.
It's ok but not as accurate as it should be, you have to enter grill sizes and other variables to get your cfm readings and I believe you shouldn't have to do that especially for what you pay for this little thing.
App crashes on startup. Useless.
I have a Galaxy Note 4, this device works fine for me. We just installed a new furnace and it has a two stage motor. I wasn't convinced it was working right, but this meter proved it. I took readings with just the 'fan' running, then took another reading after the A/C kicked in - this airflow meter proved the 2nd stage of the motor does push more air.
Uninstalling!!! Don't waste your time messing with this crap, it doesn't work! And don't waste your money on this meter, worthless! Tried installing and re-installing over five times and each time it failed. Would have given it negative 5 ⭐s but it didn't let me. Unistalled for good. Returning the meter as well.
Not worth the money Until they can increase the hardware quality of the device, this is useless. I tried mind on three different devices and got different readings on all of them. I even made sure volume was at 100 %. You get what you pay for
Improvements on readings
Instant mobile refrigerant charge calculator for HVACR applications.