Acoustic Tachometer
Jan Sokol · Utilities
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Chart standing · US
What changed · US
Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.
Measure engine RPM with a redesigned instrument dashboard, a clearer live gauge, and a Garage for your machines and saved readings. New • Follow revs (beta): after a stable idle lock, follow rising engine speed on supported evenly firing engines. V8 and V-twin profiles remain limited to idle measurements. • Customize your app with six alternate icons, available with Pro. Improved • Read RPM trends more easily with labeled time and RPM axes, and see peak RPM while following revs. • Enjoy an updated layout with improved rotation on iPad. • Benefit from updated engine-sound analysis and signal evidence. Fixed • Choosing PDF report, CSV, or JSON backup now opens the share sheet immediately. PDF and CSV exports require Pro; JSON backup is free. • Deleting a saved reading now asks for confirmation.
In-app purchases · US
No in-app purchases.
Screenshots
About
Acoustic Tachometer estimates engine RPM from exhaust or engine sound using your iPhone microphone. Choose an engine profile, start listening, and watch the app lock onto the dominant firing frequency. The app reports RPM, confidence, harmonic support, and candidate frequencies so you can tune idle speed, compare engine behavior, and capture repeatable measurements without attaching hardware. Built for quick checks on cars, motorcycles, small engines, and rotary engines where a contact tachometer is inconvenient.
What's new · 2.0
Measure engine RPM with a redesigned instrument dashboard, a clearer live gauge, and a Garage for your machines and saved readings. New • Follow revs (beta): after a stable idle lock, follow rising engine speed on supported evenly firing engines. V8 and V-twin profiles remain limited to idle measurements. • Customize your app with six alternate icons, available with Pro. Improved • Read RPM trends more easily with labeled time and RPM axes, and see peak RPM while following revs. • Enjoy an updated layout with improved rotation on iPad. • Benefit from updated engine-sound analysis and signal evidence. Fixed • Choosing PDF report, CSV, or JSON backup now opens the share sheet immediately. PDF and CSV exports require Pro; JSON backup is free. • Deleting a saved reading now asks for confirmation.
Details