250+ iOS apps curated and reviewed
Out of 250+ pvf reference apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 2.4★ (7) | No | No | Nov 2026 | |
| 2 |  | Free | — | No | No | Oct 2026 | |
| 3 |  | Free | 1.0★ (2) | No | No | May 2026 | |
| 4 |  | Free | 2.7★ (2K) | No | No | Nov 2026 | |
| 5 |  | Free | 3.5★ (2) | No | No | Oct 2026 | |
| 6 |  | Free | — | Yes | No | May 2026 | |
| 7 |  | Free | — | No | No | Sep 2026 | |
| 8 |  | Free | — | No | No | Oct 2026 |
Access industry standard terminology, specifications, and reference tables for pipe, valves, fittings, and fasteners. Quickly identify materials, understand markings, and find technical data with interactive tables and diagrams.
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