68+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our watt's law list covers 68+ iPhone apps updated through June 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.4★ (26) | No | No | Jul 2026 |
| 2 |  | Free | 4.7★ (52) | Yes | Yes | Aug 2026 |
| 3 |  | Free | 4.3★ (7) | Yes | No | May 2026 |
| 4 |  | Free | 5.0★ (2) | No | Yes | Aug 2026 |
| 5 |  | Free | 4.7★ (165) | No | Yes | Jul 2026 |
| 6 |  | $2.99 | 3.5★ (4) | No | No | Aug 2026 |
| 7 |  | Free | 4.4★ (86K) | No | No | Aug 2026 |
| 8 |  | $1.99 | — | No | No | Jun 2026 |
This app calculates electrical parameters based on Ohm's and power laws. Input any two values (voltage, current, resistance, or power) and the app will automatically compute the remaining two. It allows for continuous "what-if" scenarios by locking one parameter and recalculating others.
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 utility app calculates voltage, current, resistance, and power using Ohm's Law. Simply input any two values, and the app will compute the remaining two, providing a comprehensive tool for electrical calculations.
Easily calculate electrical values like voltage, current, resistance, and power. Input any two known values, and the app will automatically compute the rest. Supports various units for precise calculations.
This utility app calculates electrical resistance, voltage, and current using Ohm's Law. It provides a quick and easy way to solve electrical formulas for various applications.
Calculate electrical values like current, voltage, resistance, and power using Ohm's Law. Input any two known values to automatically determine the missing one. Ideal for electrical enthusiasts and professionals.
Discover, read, and listen to millions of books and audiobooks. Browse curated collections, personalized recommendations, and bestsellers. Customize your reading experience with various themes and settings, and set reading goals to build a habit. Share your library with family.
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.
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.
Easily calculate electrical power, amperage, or voltage. This tool simplifies electrical calculations for users needing to find one value when the other two are known.
Instantly calculate resistor resistance values from color codes (3-6 bands). Includes Ohm's Law and Watt's Law calculators for voltage, current, and power. Ideal for electronics enthusiasts and professionals.
This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.
Calculate the cost of running electrical devices over time. This simple tool helps you understand your energy consumption expenses.
This app simplifies electrical calculations by accurately computing voltage, current, resistance, and power. It offers a user-friendly interface and step-by-step explanations, making it ideal for students, engineers, and electricians to solve circuit problems efficiently.
This app helps you calculate voltage, current, resistance, and power. Simply input any two values, and the rest will be automatically computed with adjusted units. It supports a wide range of languages for global accessibility.
This electric circuit calculator simplifies Ohm's Law calculations. It allows users to input two known variables (current, resistance, voltage, or power) and automatically computes the unknown values. The app also supports on-the-fly unit adjustments, eliminating the need for manual conversions.
This app offers business tools to help you work smarter, build trust, and grow your customer base. It provides automated messages, organized conversations, and a professional profile to enhance customer interactions and sales.
This app simplifies electrical calculations for voltage, current, resistance, and power. It features an interactive Ohm's Law wheel to aid learning and provides both simplified and precise answer values with copy functionality. A metric toolbar helps manage prefixes efficiently.
