250+ iOS apps curated and reviewed
The best energy calculator apps on iPhone average 4.2★ 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 | 4.7★ (81) | No | No | Sep 2026 | |
| 2 |  | Free | 4.6★ (574) | Yes | Yes | Sep 2026 | |
| 3 |  | Free | 4.4★ (65) | Yes | No | Aug 2026 | |
| 4 |  | Free | 4.9★ (7) | No | Yes | May 2026 | |
| 5 |  | Free | 3.0★ (2) | No | No | May 2026 | |
| 6 |  | Free | 4.6★ (4.7K) | Yes | Yes | Sep 2026 | |
| 7 |  | Free | 4.6★ (5.1K) | Yes | No | Sep 2026 | |
| 8 |  | Free | 3.5★ (4) | Yes | No | May 2026 |
Calculate the annual cost and energy consumption of your electrical devices. Determine how long it will take for energy-saving appliances to become profitable. This tool helps you understand your energy usage and make informed decisions.
This comprehensive tool offers over 60 calculators and 16 converters for electrical engineering, wiring, and circuit analysis. It supports engineers, electricians, students, and hobbyists with calculations ranging from basic Ohm's Law to complex RLC circuits and power conversions.
Easily calculate the energy consumption and operating costs of electrical devices. Track daily, monthly, and yearly usage, analyze costs, and estimate carbon emissions to optimize power usage and save money.
