250+ iOS apps curated and reviewed
The best mini 4wd companion apps on iPhone average 3.9★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | Jul 2026 | |
| 2 |  | Free | 3.3★ (11) | No | Yes | Aug 2026 | |
| 3 |  | Free | 4.2★ (5) | No | Yes | Aug 2026 | |
| 4 |  | Free | 3.3★ (3) | No | No | May 2026 | |
| 5 |  | Free | 3.3★ (6) | Yes | No | Aug 2026 | |
| 6 |  | Free | 4.0★ (22) | No | No | Aug 2026 | |
| 7 |  | Free | 4.4★ (14) | No | No | Sep 2026 | |
| 8 |  | Free | 1.0★ (1) | Yes | No | May 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.
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.
