Engine RPM App Reviews

I was happy to see that it did work while setting the RPM on my snowblower (4 cycle). I didn't have the time or the desire to understand the app, so I just put it on Auto, and it did a better job on the output. I was not able to compare its output with an electrical input meter, but the engine did sound about right. It will suffice for now under my deciphering. Nice job!

I used this to check the RPM on a couple of lawnmowers I have. I set the engine type, set the hint, and it found the correct rpm reading very quickly. I don't think I could go out and buy a tach for ten bucks or get it hooked up and working this easily.

Allowed me to set my chainsaw high speed mixture. I was running 2k rpm rich, didn’t know how much power I was missing. Struggled a bit with idle reading, but that’s understandable because a 1-cylinder 2-cycle engine is lumpy at low speed. Increasing sample length did the trick. Much better than spending $100+ for the Stihl tachometer. Impressive piece of software.

This app worked very well to help me set the idle on my Royal Enfield 500cc single cylinder motorcycle. It picked up the “thump” of the engine immediately thus allowing me to fine tune the engine’s RPM to specification. 100% pleased!

This was a little more expensive that I would have liked but once I used it I would say it’s defiantly useful. Used it to check low and high speed of my lawnmowers and it’s right on. Just slide around the hint rpm as it’s running and it finds the speed right away. It’s also cool that you can also see the audio waveform. The app doesn’t look to fancy but as long as it keeps working with future iOS updates I’ll be happy.

The documentation explains exactly how this works, and what the limitations are. There are some big advantages too: low cost and no need to touch the engine. I used this to tune my old rototiller engine. It took some experimentation on where to position my phone near the engine, but I was able to get a strong signal and confirm max RPM and idle RPM.

An indispensable shop tool

Was able to dial in my snowblower RPMs no problem. I do think the app should have the cycle/number of cylinders option right on the Home Screen, I think that would help out. Also, would be nice if it had good enough response times to react to transient surges, really it’s only useful for steady RPM values. But overall, did what I needed for much cheaper than a small engine tach.

The Tiny Tach tachometer I’ve been using in my small engine work wasn’t extremely expensive, but it’s finicky and difficult to use when I’m tuning something like a chainsaw. This app, after a couple minutes glossing over the instructions, was almost intuitive to get to function. It will be really nice to be able to set this down and have both hands free to operate the throttle and adjust carburetor settings on equipment now. Large, easy to see display and controls plus other features I haven’t