250+ iOS apps curated and reviewed
The best available fault current calculator apps on iPhone average 3.6★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.1★ (23) | No | Yes | Aug 2026 | |
| 2 |  | Free | — | No | Yes | Jul 2026 | |
| 3 |  | Free was $0.99 | 1.0★ (2) | Yes | No | Aug 2026 | |
| 4 |  | Free | 4.2★ (5) | No | Yes | May 2026 | |
| 5 |  | $7.99 | — | No | No | Jul 2026 | |
| 6 |  | Free | 4.6★ (126) | Yes | Yes | Aug 2026 | |
| 7 |  | Free | — | Yes | Yes | Aug 2026 | |
| 8 |  | $9.99 | 5.0★ (3) | No | No | May 2026 |
This tool helps contractors, engineers, and electricians quickly calculate available fault current on single and three-phase electrical systems. It also assists in sizing fuses and conductors for various circuits and can generate labels for service equipment.
This app calculates prospective fault current (PFC) in kA and Amps for single and three-phase circuits. It allows users to input any two values (voltage, earth loop impedance, or PFC) to determine the third, aiding in selecting appropriate circuit breaker ratings.
