RPM meter

Damn thing works like a charm on my lathe. Turn the lathe on, hold my phone close to it and i can set the rpm real easy of my lathe super app! I would charge millions for it as long as i can keep mine for free lol

I used the app to read the rpm capabilities of the LEGO vacuum engines I built, it could be better, but the app read 1600 rpm at half throttle. After that it couldn't read

Works ok at very low rpm. If you can't get this to work or if you need more rpm look for an app that uses the microphone.

We used this for my son's science fair project. Worked well. We needed it to tell us rotations of a windmill. We used max rpm feature and divided the number of blades to determine the real rpm.

Very good app, but the maximum number is depend on android device! But very good app

Very useful and handy. Gives reliable measurement.

Useful for initial, quick results, and costless of tachometer.

Bullshits app . I didn't understand who give it 5 star

I love it. It is what I wanted !

Doesn't work.

nice app

Bad

Works ok at very low rpm. If you can't get this to work or if you need more rpm look for an app that uses the microphone.

I swung my hand back n forth . It read 287 RPM. FYI the sensor is on the front u have to face it forward

There only suggestions I have are to add an average rpm with the current and Max and let us change the multiplier based off that it might get more accurate readings. I use this app to measure roller rpm and created the custome calculation to make it ft/min and would work much better with an average. Also make the max min and current names change to your current multiplier so it doesn't always say rpm. Lastly if you can make the ability to add custom multiplier and name them the app would have 5 stars by me

Good app seems good as I checked it with my cnc mill and it told me the right rpm to what the machine was running at. Good app!

So good

bike. Rpm

excellent

A waste of time!

Worst app ever

Good app but not good enough to stop me spending $300 on the real thing. The current rpm needs to be averaged over 1 second and I couldn't find an rpm dial gauge. Put some effort in and you will have this app on every engineer and mechanics phone.

Could not get an rpm reading on a fan, even after putting white tape on one blade. May work better at low rpm's. Galaxy s3.

Works great estimating the speed of rotary machines

Useful and precise

Doesn't work, S4

The settings screen is lovely, unfortunately I can't get to anywhere else in the application. Everytime I try to apply the settings, it changes the rpm multiplier, and will not save the settings. I'm using a samsung galaxy s5.

Not working

Superb

Not working properly in my htc 516 desire

Nothing at all on note 3

This app doesn't help with measuring emperor and sucks big time

Didn't work for me

RPM detecting is inaccurate and slow

Apk .Txz

I'm a mechanical engineer and I love this app. Used it for few motors who specs were unknown. Thanks for an awesome e app! Note...it does not give RPM of your car! How could it?! It sense motion across the IR proximity sensor and counts the passes and time between passes.

DoesNot work right while driving doesNot match the rpm meter in the car , gives falsh readings , how can this be fixed ?

Work very well and precise for Samsung galaxy ace3. It's help me in my work. I love this app.

Works well.

Too quirky not accurate when compared to a optical hand held rpm meter, still needs work.