RPM and Speed Tachometer

Useless. On one phone nothing happened. On the other it failed to hear my lawnmower with correct settings. Uninstalled. EDIT: Well of course I adjusted the settings, isn't that what I said? I wouldn't have posted this review if I hadn't exhausted all possibilities.

Doesn't work. The rpm arrow is flactuating between 1k and 9k. Im sure I'm within this range without the app. Not recommended.

the concept is amazing. it works off listening the the motor, in the settings, you need to pick how many cylinders. same principle as a normal distributor where it counts "x" amount of sparks in a time frame to give tpm, but I'm guessing it uses the mic to hear the differences inside the motor that we can not tell. I tried with my daily car and it read close to what my tachometer was saying. my 1940 classis doesnt have a tachometer installed and I been wishing to know the rpm, cant wait to test!

It's kinda hard to use if your near the road .. You need to be far away fron the street to a quiet place. Because it picks up the surrounding sound . Maybe fix the distance that it can hear?

This one desnt work either. Yes its an add scam. In response to your comment, I would not purchase the pro version if the free one does not read any RPM at all. the guage just sits at 3k and never moves.

So my honda generator was being a jerk...I knew it was the automatic idle. Too high and it would surge, too low and it would stall. Had to find that 3500rpm sweet spot, but how? I'm not a mechanic so don't have the tools, maybe I can download something. So I downloaded this app, and no $h¡t my generator is running better than it has been for a year! Great app!!! I can only say sorry you can't figure it out, to the people who can't figure it out

To know rpms you need to know, the gear ratio, the tire size and the speed.

Hi there ! Seems to work accurately, however, why no possibility to key-enter one's own specs ? My van is for example 91db idle for a 3.150 rpm range. Should not your software then grow in precision ?

GPS is required to measure turntable speed? Maybe you don't understand...

as soon as I open the app it flags up a fault that another app is using my microphone on my phone please close it. like I know what app it is that's using it 🙄

total scam and full of ads. how can this thing measure rpm and speed while it only ask mic permission, no gps or Bluetooth for OBD?

Not accurate in the slightest. Uninstalled within seconds (mechanical engineer)

How do i get refund? At the first install, i already pay for the pro version, with hope it will work, but while im using it on the road.. i didnt get as i expect.. it miserable unusefull..

doesn't work at all. Before you can use the RPM app you need to pay first.

Won't work without GPS privileges

It's cool because when I spin my figet spiner on it . It worked

Useless. Only adds and those too sticky.

RPM not working but speedometer working.

This doesn't work rpm doesn't work I tested it with a 2020 ford Mustang GT

needs audio to function

looks interesting if I ran with it would it tell RPMs 😂 got to try it

The bike is off and in app the rpm is raising till 5000rpm

Would not read the movement right way

This app is not working

How it is working?

Need Apple

Thank you