apps / 340401811
Engine RPM
Acoustic Tachometer
Real-Time Specialties · Utilities · $8.99 · US storefront
- rating
- 4.0 ★
- ratings
- 35
- updated
- Oct 2, 2026
- released
- Dec 2, 2009
v2.6.1
visible word pool · 4 words
title 10/30 chars · subtitle 19/30 chars
App Store search indexes the title and subtitle together with the hidden 100-character keyword field as one combined pool: any phrase assembled from those words can rank. These are the words of Engine RPM's pool that are public — the keyword field is not exposed by any API.
from the listing
Measure the RPM of an engine by analyzing the sound it makes. Engine RPM listens to the sound of a running engine and uses advanced signal processing algorithms to extract the frequency of that sound and calculate the RPM. This app is primarily for setup and diagnostics of engines. After setting the the number of cylinders and whether the engine is a 2-stroke or 4-stroke engine, the app can work with any internal combustion engine, from diesel tractors to aircraft engines to…
latest US reviews
★★★★★
Did not work
Needed to monitor and adjust the idle on my motorcycle. Did not once register a live rpm reading. No matter what settings I adjust it still held the same 4 digit reading in red. I placed my phone even directly behind the exhaust and the number read the same even tho I raised and…
— NoNickaroo
★★★★★
Great concept. Great execution. Great price!
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.…
— Rein’s Small Engine
★★★★★
Frustrating
I just want my 9 dollars back. Sick of trying to get this to work.
— efffyooo
Newest first, from Apple's public reviews feed. Agents can pull hundreds per storefront with the reviews tool.
Where does it rank? Chart position is one signal — most installs come from keyword search. Check where Engine RPM ranks for any keyword, free, with the rank checker.
this page is one tool call
{ "tool": "app", "arguments": { "appId": 340401811, "countries": [ "US" ], "subtitle": true } }
The app tool returns this listing as stable JSON for any storefront — one of thirteen ASO tools your agent gets over MCP. Get a free key.