247+ iOS apps curated and reviewed
The Power Law Calc is the household name in the power law calc, but it's far from the only option. We track 247+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | May 2026 | |
| 2 |  | Free | 4.7★ (52) | Yes | Yes | Oct 2026 | |
| 3 |  | $1.99 | 4.0★ (3) | No | No | Aug 2026 | |
| 4 |  | Free | 5.0★ (2) | No | Yes | Aug 2026 | |
| 5 |  | $2.99 | 3.5★ (4) | No | No | Oct 2026 | |
| 6 |  | Free | 4.7★ (1.3K) | Yes | Yes | Oct 2026 | |
| 7 |  | Free | — | No | Yes | May 2026 | |
| 8 |  | Free | 4.5★ (2) | No | No | May 2026 |
This utility app quickly calculates voltage, current, resistance, and power using Ohm's and Watt's laws. It's designed for electricians, engineers, and students, offering instant, accurate results with a simple interface. Works offline and is ideal for field calculations or exam preparation.
This tool calculates Ohm's Law for single and three-phase applications using vector calculations for balanced and unbalanced loads. It quickly determines Watts, Volts, Amps, or Ohms, and can back-calculate load resistance. Widget support is included.
