185+ iOS apps curated and reviewed
Out of 185+ energy efficiency calculator apps on iOS, 19 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (1) | No | No | May 2026 |
| 2 |  | Free | 4.9★ (404K) | Yes | No | Aug 2026 |
| 3 |  | Free | 4.8★ (11K) | No | No | Aug 2026 |
| 4 |  | Free | 4.7★ (13K) | Yes | Yes | Aug 2026 |
| 5 |  | Free | 4.7★ (1.7M) | Yes | Yes | Aug 2026 |
| 6 |  | Free | 4.6★ (867) | Yes | No | Jul 2026 |
| 7 |  | Free | 4.6★ (4.8K) | Yes | No | Aug 2026 |
| 8 |  | Free | 4.6★ (2.1K) | No | No | Aug 2026 |
An interactive tool designed to teach users about energy efficiency through engaging games and activities. Users can estimate energy costs for home appliances and learn how behavior changes can impact electricity usage and savings. It's geared towards students, parents, and teachers.
This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.
This app offers detailed analysis of your home's energy consumption, providing insights and recommendations to help you save money, conserve energy, and reduce your carbon footprint. Track your usage in real-time and over time with various comparison options.
This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.
This app offers a comprehensive suite of calculation tools, including basic, scientific, and unit conversion functions. It features an AI-powered math solver that can solve problems from photos and a dedicated math notes section for jotting down equations and diagrams. Accessibility options like dynamic text size and VoiceOver support are also included.
Earn cash back and reduce your electricity bill by learning when and how to cut energy usage. This free app helps you create new energy-saving habits and understand your consumption. Participate in events to save electricity and get paid, while also reducing your carbon footprint.
This app offers a comprehensive suite of over 40 calculators and unit converters for various needs, including finance, health, construction, and everyday math. It features standard, scientific, and specialized calculators for tasks like loan amortization, currency conversion, and material estimation.
Gain real-time insights into your home's energy consumption to reduce electricity bills and minimize environmental impact. Identify energy-wasting devices and receive custom notifications for enhanced home safety and efficiency.
Easily calculate your vehicle's gas mileage on a single screen. Track your fuel efficiency over time with historical data and quick comparison features. Ideal for anyone needing a straightforward way to monitor MPG.
A highly customizable calculator app offering a modern interface and extensive features. Personalize themes, button layouts, and visual elements. Track your calculations with a detailed history and access scientific functions.
This free scientific calculator offers essential features like RPN mode, unit conversions, and multiple undo/redo. It provides a taste of a more powerful version, with optional in-app purchases for expanded functionality.
A user-friendly calculator app featuring large buttons and customizable colorful backgrounds. It offers a dual-line display, multi-line input for complex equations, and convenient gesture controls for editing and copying.
This is a straightforward calculator application designed for ease of use and clear readability. Users can personalize the app's appearance by choosing their preferred background and display themes.
Monitor and manage your home energy system and electric vehicle charging. Optimize solar power usage for sustainability and cost savings. Track energy production, consumption, and grid supply in a clear, structured format.
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.
This app combines numerous essential calculation tools into a single, user-friendly interface. It handles everything from basic arithmetic and unit conversions to financial planning, health tracking, and academic performance. Simplify your daily tasks with this comprehensive utility.
A highly customizable calculator app offering a modern interface and powerful features. Personalize themes, button layouts, and visual elements to your preference. Track and save calculations with a detailed history, and access scientific functions when needed.
Plan your financial future with a powerful compound interest calculator. It helps you visualize investment growth with periodic contributions and plan retirement withdrawals with inflation adjustments. Offers detailed breakdowns and interactive charts for informed financial decisions.
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.