250+ iOS apps curated and reviewed
Every iPhone needs a few good ecpm, ctr, rpm calculator apps. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | $1.99 | — | No | No | May 2026 | |
| 2 |  | Free | 2.3★ (33) | Yes | Yes | Aug 2026 | |
| 3 |  | Free | 3.3★ (11) | No | Yes | Aug 2026 | |
| 4 |  | Free | 5.0★ (5) | No | No | Aug 2026 | |
| 5 |  | Free | 5.0★ (1) | No | No | Aug 2026 | |
| 6 |  | Free | 4.2★ (5) | No | Yes | Aug 2026 | |
| 7 |  | Free | — | Yes | No | May 2026 | |
| 8 |  | Free | 4.4★ (1.7K) | Yes | Yes | Sep 2026 |
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.
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.
