Tacho Meter Strobe Light

Far too many ads! Literally every time you click on anything you get an ad. Also it has absolutely no instructions for use. What do all those buttons do? No idea. Uninstalling...

Very poor. Works badly. Resets when phone turns sideways or chages window. Back to ads. I think it is full of jitter as it cannot produce a steady visible image of a 50 hz (50 x 60 second) strobe pattern like an incandescent lamp on the mains.

App is great. works as designed. A fair amount of advertising to wade through, Sometimes you have to open it close it reopened to make the adds go away. But it works good enough to Tell exactly what I'm looking at on a 2 stroke boat motor. I had that as running exactly 5500 R.P.Ms to figure out what prompt I need. I was able to pinpoint 5500 R.P.M with a chalk line on the flywheel and this app.