247+ iOS apps curated and reviewed
power grid calculator is the household name in power grid calculator, 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 | No | May 2026 |
| 2 |  | Free | 4.6★ (36K) | Yes | Yes | Aug 2026 |
| 3 |  | Free | 4.5★ (2) | No | No | May 2026 |
| 4 |  | Free | 4.7★ (9.3K) | No | No | Aug 2026 |
| 5 |  | Free | — | No | No | May 2026 |
| 6 |  | Free | — | Yes | Yes | Jul 2026 |
| 7 |  | Free was $2.99 | 3.0★ (5) | No | No | Jun 2026 |
| 8 |  | Free | 4.3★ (332) | No | No | Aug 2026 |
This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.
This app provides a straightforward calculator designed for the electrical industry, offering tools for power and lighting calculations. It helps users determine generator and UPS requirements, convert units, and calculate fuel consumption. Suitable for both professionals and casual users needing electrical calculations.
Securely manage your utility account on the go. Access billing, schedule payments, and report outages with ease. Biometric login provides quick and secure access to your account information and support.
This app helps you accurately calculate power outage durations and battery performance. It factors in real-world conditions like battery discharge, inverter efficiency, and device consumption to provide realistic estimates for runtime and charging.
This app offers a powerful scientific calculator with a wide range of functions for trigonometry, statistics, and combinatorics. Users can define and evaluate their own functions, assign values to variables, and view multiple expressions simultaneously. It works offline and is completely free to use.
This app offers a comprehensive suite of 26 electrical and electronics calculators and converters. It helps users compute various electrical properties, including Ohm's Law, current, power, voltage, and resistance. It also features tools for wire ampacity, voltage drop, and LED resistor calculations.
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.
This app provides precise mathematical and scientific calculations for various needs. It helps users calculate generator and UPS requirements, convert lumens to watts, and estimate generator fuel consumption. It's designed for students, professionals, and anyone needing accurate computations.
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 application provides a straightforward and efficient calculator experience. It offers features like calculation history, easy editing of previous entries, and the ability to reuse past results. Mark important calculations and share your work with others.
This app serves as an advanced electrical power calculator. It allows users to easily compute and convert between Watts, Amps, and Volts for single-phase systems, and kW, Amps, Volts, and Power Factor for three-phase systems. Simply input known values to find the missing one.