250+ iOS apps curated and reviewed
Every iPhone needs a few good diagnostic tool 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 |  | Free | 5.0★ (4) | No | No | May 2026 | |
| 2 |  | Free | 4.4★ (329) | Yes | No | Nov 2026 | |
| 3 |  | Free | 4.8★ (40K) | No | Yes | Nov 2026 | |
| 4 |  | Free | 4.8★ (33K) | Yes | Yes | Nov 2026 | |
| 5 |  | Free | 5.0★ (1) | No | No | Oct 2026 | |
| 6 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 7 |  | Free | 1.5★ (4) | No | No | May 2026 | |
| 8 |  | Free | — | No | No | Jun 2026 |
Quickly resolve error codes for Control Techniques' drives with this tool. It includes wiring diagrams for setup and fault finding, plus direct access to global technical support contact information.
Diagnose over 40 hardware and system issues with this app. Monitor your phone's hardware, battery, memory, and storage. Track network usage and daily charging cycles to keep your device running smoothly.
This app provides comprehensive vehicle care and repair information for car and truck owners, DIYers, and technicians. It offers diagnostic capabilities with compatible OBD2 scanners and a vast database of verified fixes from ASE Master Technicians. Users can also access free vehicle maintenance information and schedule repairs.
