249+ iOS apps curated and reviewed
The best engineering app on iPhone average 4.5★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Sep 2026 | |
| 2 |  | Free | 3.7★ (9) | No | Yes | Aug 2026 | |
| 3 |  | Free was $5.99 | 4.8★ (986) | No | Yes | Sep 2026 | |
| 4 |  | Free | 4.8★ (64) | Yes | Yes | Sep 2026 | |
| 5 |  | Free | 4.1★ (65) | Yes | No | Sep 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | 4.6★ (14K) | No | Yes | Sep 2026 | |
| 8 |  | Free | 4.7★ (32K) | Yes | Yes | Sep 2026 |
This app provides piping engineers with essential tools, dimensions, and standards for design and analysis. It includes calculators, checklists, software shortcuts, and educational resources to streamline work and enhance knowledge.
This app provides electricians, students, and installers with essential electrical theory, interactive diagrams, and practical calculators. It includes a community forum for users to share knowledge and seek advice, all accessible offline without ads or subscriptions.
