248+ iOS apps curated and reviewed
If you already know Box Fill Pro, this is the deeper bench. 248+ electrical box fill calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Aug 2026 | |
| 2 |  | Free | 4.8★ (20) | No | Yes | Oct 2026 | |
| 3 |  | Free | 4.5★ (771) | No | No | Oct 2026 | |
| 4 |  | Free | 1.0★ (1) | No | Yes | Oct 2026 | |
| 5 |  | Free | 3.6★ (18) | No | No | Oct 2026 | |
| 6 |  | $3.99 | 3.3★ (3) | No | No | Oct 2026 | |
| 7 |  | Free | 4.6★ (197) | No | No | Oct 2026 | |
| 8 |  | Free | — | No | Yes | Sep 2026 |
Calculate electrical box and conduit fill accurately according to the NEC. This app provides instant, reliable calculations for electricians, contractors, and students, saving time on job sites. It offers support for various box and conduit types, conductor sizes, and includes wire volume data.
This tool assists electricians, engineers, and contractors in determining the correct conduit size based on NEC guidelines. It calculates conduit fill percentages and jam probability, saving time compared to manual calculations.
