# SoundTach — RPM from Engine Sound > Measures engine RPM from exhaust sound using advanced audio analysis. (iPhone/iPad app by XCARAB INC.) - Source: https://appshunter.io/ios/app/soundtach/id6755052370 (this page in markdown: same URL + `.md`) - Developer: [XCARAB INC](https://appshunter.io/developer/1724974508) - Category: Utilities - Price: Free with in-app purchases - Rating: 4.20/5 from 5 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 51 MB - Languages: English - Released: 2025-12-16 - Data updated: 2026-08-06 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/soundtach/id6755052370/reviews.md ## What is SoundTach? MEASURE ENGINE RPM FROM SOUND - NO TOOLS NEEDED SoundTach is the easiest way to measure engine RPM on motorcycles, cars, lawn mowers, chainsaws, and small engines. Simply point your phone at the exhaust and see accurate RPM readings in seconds. HOW IT WORKS SoundTach uses advanced audio analysis to detect engine RPM from exhaust sound. No OBD adapter, wires, or manual calibration needed. Just: 1. Select the engine type 2. Point your phone at the exhaust 3. See real-time RPM readings The app automatically filters background noise and provides confidence indicators so you know when readings are accurate. KEY FEATURES - Automatic RPM Detection - Works with a wide variety of engines - 2-Stroke & 4-Stroke Support - Motorcycles, dirt bikes, ATVs, scooters - No Manual Configuration - Automatic gain and filtering - Real-Time RPM Display - Smooth, accurate readings - Signal Quality Indicator - Know when to move closer or back - Clean, Professional Interface - Easy to read outdoors SUPPORTED ENGINES - Motorcycles (street bikes, sport bikes, cruisers) - Dirt bikes and motocross - Scooters and mopeds - ATVs and UTVs - Lawn mowers and tractors - Chainsaws and trimmers - Generators and pumps - Go-karts and mini bikes - Small aircraft engines PERFECT FOR Motorcycle Tuning - Set idle RPM precisely without expensive equipment. Perfect for carbureted bikes like vintage motorcycles, cafe racers, and classics. Mechanic Tools - Add SoundTach to your diagnostic toolkit. Great for quick RPM checks on customer vehicles. Small Engine Repair - Tune lawn equipment, chainsaws, and generators to manufacturer specifications. DIY Maintenance - Save money by tuning your own equipment. No need to buy dedicated tachometer gauges. WHY SOUNDTACH? SoundTach works automatically. No gain adjustments, no filter configuration, no threshold tuning. Just point and measure. Our advanced signal processing handles: - Automatic gain normalization - Intelligent noise filtering - Harmonic verification - Adaptive smoothing GET STARTED FREE Try SoundTach free for 7 days with unlimited measurements. No purchase required. SUPPORT Questions? Contact us at support@soundtach.com Visit soundtach.com for tutorials and tips ## Key features - Automatic RPM detection from sound - Supports 2-stroke and 4-stroke engines - No manual configuration required - Real-time RPM display - Signal quality indicator - Professional and easy-to-read interface ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Full Access - Pay Once | $4.99 | one-time | ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/soundtach/id6755052370/reviews.md ### 1/5 — Cost Disclosure?? *2026-06-09, version 1.3.6* The app owner will be happy to tell you everything you want to know about this app, including that it is free for seven days, but there is zero information to be found regarding the cost buy the app. I honestly don’t understand why this information can’t be more transparent. ### 5/5 — App *2026-06-08, version 1.3.6* I mean… it work mebey not super duper accurate but still nice to use you don’t have to pay too so that cool ### 5/5 — Simple and it works *2026-06-03, version 1.3.6* Helped me to troubleshoot small engine. Shows accurate value ### 5/5 — So easy to use and it works *2026-04-27, version 1.3.0* This is a great app that just simply works. I have used the Engine RPM app and it’s finicky with the settings. With This app you just tell it what kind of engine you have for your situation and it figures out the settings. This app compared within 1% of the rpm shown in my trail tech tachometer on my motorcycle ### 5/5 — Amazing *2026-03-15, version 1.3.0* Simple and flexible for all kinds of engines. It was a big lifesaver time tune my Suzuki DR650. And I used other cars/motorcycles with different engine types to compare this app with the real tachometers, the app is right on! ## Frequently asked questions about SoundTach ### How does SoundTach measure engine RPM? SoundTach uses advanced audio analysis to detect engine RPM directly from the sound of the exhaust. It automatically filters background noise and verifies harmonics to provide accurate readings without any physical tools or adapters. ### What types of engines does SoundTach support? SoundTach supports a wide variety of engines including motorcycles, dirt bikes, ATVs, scooters, lawn mowers, chainsaws, generators, and even small aircraft engines. ### Does SoundTach require any manual calibration? No, SoundTach is designed for automatic operation. It handles gain normalization, noise filtering, and smoothing without requiring any manual configuration from the user. ### How accurate are the RPM readings from SoundTach? The app provides real-time, smooth, and accurate RPM readings. It also includes a signal quality indicator to help users ensure they are getting the best possible measurement. ### Is SoundTach available on all devices? Based on the information, SoundTach is available for iPhone and iPod devices. It is not specified if an Android version is available. ### How often is SoundTach updated? The latest version of SoundTach is 1.3.6, and it was last updated on April 29, 2026. This indicates a relatively active development cycle. ### What is the user sentiment for SoundTach? SoundTach has a rating of 4.2 stars from 5 ratings, suggesting generally positive user feedback on its functionality and ease of use. ### Does SoundTach have ads? No, the application data indicates that SoundTach does not contain advertisements. ## Version history (last 5 releases) ### 1.3.6 — 2026-04-29 Includes bug fixes. The RPM display should now fit screens that have display zoom enabled. ### 1.3.0 — 2026-01-12 Added support for more languages ### 1.2.2 — 2026-01-08 Added support for more languages ### 1.2.1 — 2026-01-05 Added support for more languages ### 1.1.1 — 2025-12-16 No release notes. ## Related topics [engine rpm](https://appshunter.io/ios/topics/engine-rpm) · [rpm meter](https://appshunter.io/ios/topics/rpm-meter) · [rpm gauge](https://appshunter.io/ios/topics/rpm-gauge) · [rpm go](https://appshunter.io/ios/topics/rpm-go) · [engine sound diagnostic](https://appshunter.io/ios/topics/engine-sound-diagnostic) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-06.*