248+ iOS apps curated and reviewed
The best troubleshooting apps on iPhone average 4.3★ across 248+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (122) | No | No | Oct 2026 | |
| 2 |  | Free | 3.7★ (3) | No | No | Oct 2026 | |
| 3 |  | Free | 5.0★ (2) | No | No | May 2026 | |
| 4 |  | Free | 5.0★ (2) | No | No | May 2026 | |
| 5 |  | Free | 3.5★ (13) | No | No | Oct 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | 1.0★ (5) | No | No | Oct 2026 | |
| 8 |  | Free | — | No | No | May 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 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.
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.
