217+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our rpms list covers 217+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 3.3★ (11) | No | Yes | Aug 2026 |
| 2 |  | Free | 4.5★ (242) | No | No | Aug 2026 |
| 3 |  | Free | — | No | Yes | May 2026 |
| 4 |  | Free | — | No | No | May 2026 |
| 5 |  | Free | 4.9★ (49K) | Yes | Yes | Aug 2026 |
| 6 |  | Free | 4.4★ (1.7K) | Yes | Yes | Aug 2026 |
| 7 |  | Free | — | No | No | May 2026 |
| 8 |  | Free | 4.7★ (2.2K) | No | Yes | Aug 2026 |
This tool measures the rotational speed of motors, ideal for hobbyists working with drivable model cars. It features noise removal, speed conversion, and a memo panel for recording measurements. Customizable skins add a personal touch to the user experience.
Control your classic car's ignition wirelessly via Bluetooth. Adjust advance and vacuum curves, monitor real-time engine data, and utilize features like a PIN-code immobilizer and rev limiter. Compatible with a wide range of classic vehicles.
This application functions as a smart RPM and speed meter, providing real-time data for users. It offers a digital display of vehicle performance metrics. The app is available for free with an optional premium subscription.
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 measures the real-time speed accuracy of your turntable, displaying variations like wow and flutter graphically. It helps you identify and correct speed inconsistencies for optimal audio playback. Features include a history log and a unique visualization of inaccuracies around the vinyl center.
This application displays your current speed and location on a map. Easily switch between various measurement units with a simple swipe. It offers an ad-free and cost-free experience.
Instantly measure engine RPM by listening to its sound through your phone's microphone. No external sensors or adapters needed. Ideal for diagnosing and monitoring various engines hands-free.
Measure your vinyl turntable's speed and wow with accuracy using just your phone. Save past readings for comparison and enjoy a modern interface. Supports all common record speeds.
Calculate lathe RPM based on material, designation, and tool type. Supports a wide range of materials and allows for unit changes. Simply input your work diameter to get the RPM value.
Measure the speed of any rotating object with precision using your phone's gyroscope or camera. View real-time RPM data on a live gauge and graph, save your measurements, and compare historical readings. Ideal for calibrating turntables and testing various rotating equipment.
This app provides essential calculators and conversion tools for grinding processes. It helps users determine starting parameters for wheel truing, optimize coolant delivery, and convert wheel speeds for safe operation.
Discover and play random songs from digitized 78rpm records hosted online. Save favorite artists and individual tracks for easy access. The app automatically loads your last listening session.