# Acoustic Tachometer

> RPM from engine sound

Canonical page: [https://chrome-stats.com/d/id6789524641](https://chrome-stats.com/d/id6789524641)

## Overview

- **ID:** `id6789524641`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Jan Sokol
- **Category:** Utilities
- **Version:** 1.1
- **Last updated:** 2026-08-11
- **First published:** 2026-07-31
- **Size:** 1.66 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/acoustic-tachometer/id6789524641)
- **Website:** [https://cognerva.com/acoustictach/](https://cognerva.com/acoustictach/)
- **Privacy policy:** [https://cognerva.com/acoustictach/privacy/](https://cognerva.com/acoustictach/privacy/)

## Description

Estimate engine RPM from exhaust or engine sound using your iPhone microphone.

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.

## Rankings

- #1,669,550 — Overall

## Similar extensions and apps

- [SoundRPM: Engine Tachometer](https://chrome-stats.com/d/id6787410484) — 5.00 / 5
- [Engine RPM](https://chrome-stats.com/d/id340401811) — 4.00 / 5
- [SoundTach](https://chrome-stats.com/d/id6755052370) — 3.90 / 5
- [MyRPMCalc](https://chrome-stats.com/d/id6792172193)
- [AcceloVibe](https://chrome-stats.com/d/id6747295321)
- [Strobe Light – RPM](https://chrome-stats.com/d/id6747579407) — 2.00 / 5
- [TachoCamera](https://chrome-stats.com/d/id6784467470)
- [Motor Pitch Analyzer](https://chrome-stats.com/d/id6502329028) — 1.00 / 5
- [モーター回転数計 - 音でRPM計測](https://chrome-stats.com/d/id6806788279)
- [EngineForge](https://chrome-stats.com/d/id6785618573)
- [Stroboscope: 300Hz + Presets](https://chrome-stats.com/d/id6760181575)
- [TurboTune](https://chrome-stats.com/d/id6761314616) — 5.00 / 5

---

Source: [Chrome-Stats](https://chrome-stats.com/d/id6789524641)