Video tachometer

I found this app to be incredibly useful. I didn’t trust the tachometer on my boat, and this app worked like a charm in confirming it. It’s beautifully done. I didn’t quite understand why I needed the 2X and divided by two buttons, but it becomes clear after you’ve used it for a bit, and that you need to find the maximum RPM value that works otherwise you might be looking at halftime or quarter time or eighth time Etc., but two dollars it’s a steal. Clever Developers should be rewarded. Well done!

I acquired an old Snapper riding lawnmower that was reving very high until I adjusted the governor down. I wanted to verify the engine RPM was in a good spot, so I thought about the Tachometer RPM testers I use at work and started wondering if my iPhone camera could check RPM. Sure enough I found this! This app helped confirm that the old powerful little engine was running at the factory rating of 3300 RPM. I was very impressed by the app and how easy it was to use. Wish I could download it for the first time again. 5 stars

I used this to check the accuracy of the engine tachometer in my Cessna 172 airplane. I was checking “static RPM” (wide-open throttle with brakes set on the ground) and found it to be lower than spec, which was concerning. I checked with the shop and they had measured it at 2306 which is to spec. The tach indicated only 2200. Using this, I measured 2310 (I had not yet upgraded to the full version allowing adjustments of 1) which confirmed the shop’s findings and made me feel a lot better about the engine’s output. Very happy with the app!