How it work?
First you need to mark on the edge of machine whose rotational speed to be find, make sure the machine is placed under suitable darkness, now go to the app, turn it on, in the input Field put approximate value of RPM, and focus your flash light on the rotating machine, now adjust RPM from the bar UP or Down and reach at the point where the mark on machine look stationery. Then read the value from input Field, this is the RPM of your rotating machine.

Features of the RPM Meter - Strobe Lights
• Simple and smooth interface
• Easy to use app, user-friendly
• Small size app
• No internet connectivity needed
• On off button like a torch
• RPM Meter – Strobe Light can be used as a Torch light
• Strobe light mode works like a stroboscope. The Strobe light speed can be set in the different ways like seek-bar, plus minus buttons and also user can enter manually in text field.