250+ iOS apps curated and reviewed
With an average user rating of 3.7★, the nsys diagnostics category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | Sep 2026 | |
| 2 |  | Free | 2.9★ (35) | No | No | Oct 2026 | |
| 3 |  | Free | — | No | No | May 2026 | |
| 4 |  | Free | — | No | Yes | Oct 2026 | |
| 5 |  | Free | — | No | No | May 2026 | |
| 6 |  | Free | — | No | No | Oct 2026 | |
| 7 |  | Free | 4.7★ (99K) | No | No | Oct 2026 | |
| 8 |  | Free | — | No | Yes | Oct 2026 |
This app helps you manually test your phone's hardware, sensors, and components to ensure they are functioning correctly. It provides a standardized checklist for basic functionality checks, requiring user input for each test.
