210+ iOS apps curated and reviewed
The best troubleshooting apps on iPhone average 4.8★ across 210+ 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 | 4.8★ (118) | No | No | Sep 2026 | |
| 2 |  | Free | 5.0★ (2) | No | No | May 2026 | |
| 3 |  | Free | 3.7★ (3) | No | No | May 2026 | |
| 4 |  | Free was $29.99 | — | Yes | Yes | May 2026 | |
| 5 |  | Free | 5.0★ (4) | No | No | May 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | 5.0★ (2) | No | No | May 2026 | |
| 8 |  | Free | — | Yes | No | Aug 2026 |
Learn to troubleshoot electrical circuits with a virtual voltmeter and PLC logic. This app offers 17 random electrical problems for a challenging learning experience, allowing you to practice identifying issues in motor starters and control circuits.
This app guides users through diagnosing and solving hydraulic equipment problems. It utilizes process flow diagrams, text, and video to ensure accurate and efficient troubleshooting for mechanics and technicians.
This app helps HVACR technicians diagnose and resolve system issues. It guides users through common symptoms, identifies potential causes, and recommends solutions. An offline database is available for use in remote locations.
