249+ iOS apps curated and reviewed
The best tachometer digital apps on iPhone average 4.4★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.6★ (84) | No | Yes | Aug 2026 |
| 2 |  | Free | 4.3★ (83) | No | Yes | Aug 2026 |
| 3 |  | Free | 5.0★ (1) | No | Yes | Aug 2026 |
| 4 |  | Free | — | Yes | No | May 2026 |
| 5 |  | Free | — | No | No | Aug 2026 |
| 6 |  | Free | — | No | No | May 2026 |
| 7 |  | Free | 4.2★ (255) | No | No | Aug 2026 |
| 8 |  | $2.99 | — | No | No | Aug 2026 |
This app uses slow-motion video to create a strobe light effect, allowing you to measure rotational speeds. It records video with detailed information like frame rate and exposure, and offers customizable text overlays.
Measure rotational speeds of objects using your phone's flashlight, laser, or magnetic sensor. Detect precise RPMs with adjustable flicker frequencies and a wide measurement range. Ideal for analyzing fan speeds, engine RPMs, and more.
Estimate engine RPM using your iPhone's microphone without any extra hardware. Ideal for classic cars, motorcycles, and small engines, it provides real-time readings with confidence levels and measurement history.
This application transforms your smartphone into a digital tachometer using its flashlight. It measures the rotational speed (RPM) of objects by flashing light at them, making them appear stationary when the flash rate matches their speed. Save readings and use it for mechanics, education, or industrial checks.
Transform your iPhone into a powerful strobe light and tachometer. Precisely control flashing speeds from 1Hz to 130Hz to measure the RPM of rotating objects by making them appear stationary. Ideal for precise speed measurements in dark environments.
Transform your device into a versatile GPS speedometer and trip tracker. Monitor speed, distance, and altitude during driving, cycling, or walking. Features include a heads-up display and intelligent alerts for speed limits.
This GPS-powered application displays your current speed in a clear digital format, suitable for vehicles, cycling, or walking. It offers offline functionality and provides additional features like trip distance measurement, altitude tracking, and real-time speed limit warnings.
This app provides a simple and beautiful speedometer for iPhone and iPad. It allows users to easily track their speed with an extra-large digital display, functioning as a HUD.
Measure engine RPM from sound without any tools. Simply point your phone at the exhaust of various engines like motorcycles, cars, or lawn mowers to get accurate, real-time readings. The app automatically filters background noise and indicates signal quality for reliable measurements.
This app provides real-time speed tracking using your phone's GPS. It logs trips, displays speed in MPH or km/h, and offers an optional speed limit alert. All trip data is stored locally for privacy.
This application displays your current speed in miles per hour, kilometers per hour, or knots. It features a large, clear display with Retina support for optimal visibility. Accuracy is enhanced by adjusting indicator transparency.
This app functions as a sophisticated speedometer, alerting you to speed limit violations with visual and auditory cues. It also provides location sharing, altitude readings, and a GPS black box for trip data. Calculate mileage, costs, and fuel consumption for your journeys.
This app displays your real-time speed in both analogue and digital formats, featuring an odometer to track your journey. It records average and maximum speeds, allowing you to monitor your travel distance on various vehicles.
Measure rotational speed using your phone's camera or a simulated strobe light. Simply mark the rotating object and adjust the settings until it appears stationary to get an accurate RPM reading. The app also functions as a torchlight.