249+ iOS apps curated and reviewed
The best tdh calculator apps on iPhone average 4.2★ across 249+ 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 | — | No | No | May 2026 | |
| 2 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 3 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 4 |  | Free | 5.0★ (3) | No | No | May 2026 | |
| 5 |  | Free | 3.0★ (1) | No | No | May 2026 | |
| 6 |  | Free | 3.0★ (1) | Yes | No | May 2026 | |
| 7 |  | Free | 4.9★ (409K) | Yes | No | Oct 2026 | |
| 8 |  | Free | — | No | Yes | May 2026 |
This utility app assists engineers and technical personnel in calculating system parameters for slurry pipe and pump sizing. It computes required head pressure and limiting settling velocity based on user-inputted system data. The tool aims to simplify the selection process for slurry pumps.
This app simplifies system requirement calculations for pumps. Users input details like flow rate, pipe type, size, and length to determine total dynamic head, NPSHa, and losses. It helps users select the correct pump based on actual conditions, saving time onsite or remotely.
