250+ iOS apps curated and reviewed
The best geothermal calculator apps on iPhone average 4.6★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | $2.99 | — | No | No | May 2026 |
| 2 |  | Free | 4.9★ (409K) | Yes | No | Aug 2026 |
| 3 |  | Free | 4.3★ (6) | No | No | Jul 2026 |
| 4 |  | Free | — | Yes | Yes | Jul 2026 |
| 5 |  | Free | 4.7★ (910) | Yes | No | Aug 2026 |
| 6 |  | Free | 4.4★ (3.6K) | Yes | No | Aug 2026 |
| 7 |  | Free | 4.9★ (34K) | Yes | Yes | Aug 2026 |
| 8 |  | Free | 4.4★ (4.2K) | Yes | No | Aug 2026 |
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 audio guide app leads you through an exhibition about geothermal energy. Navigate the exhibition using an interactive map and listen to audio stops that correspond to your location. Explore Iceland's geothermal sector through displays, interactive exhibits, and videos.
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.
A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.
This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.
This app offers a straightforward calculator with a large display and oversized buttons for easy operation. It's designed for everyday tasks, enabling users to perform fundamental arithmetic like addition, subtraction, multiplication, and division with clarity and convenience.
This app offers a comprehensive scientific calculator with advanced functions for math, finance, and engineering. It includes unit and currency conversion, a constants library, and a biorhythm calculator for daily insights. The interface is intuitive and supports multiple calculation modes.
This app offers a versatile calculator with both basic and scientific functions. It includes advanced features like currency and unit conversions, customizable themes, and history tracking. Optimized for both portrait and landscape modes, it's designed for users needing precise calculations and conversions.
This ad-free utility offers a clean and intuitive interface for performing calculations. It includes essential features like a backspace button and support for parentheses, making complex equations manageable. Enjoy a streamlined calculation experience without interruptions.
This app offers a comprehensive suite of 15 calculators for everyday and scientific needs. Easily perform basic arithmetic, complex scientific functions, and specialized calculations like sales tax, age, and loan payments. It also includes a robust unit converter for various measurements.
This app redefines the calculator experience for touch-screen devices with a modern, intuitive design. It offers features like a tape log for storing calculations, formula evaluation, and iPad multitasking support for enhanced productivity.
Perform calculations quickly and accurately with large buttons. Personalize the interface by selecting custom background and text colors. This straightforward utility is designed for intuitive use.
This app is a powerful and intelligent calculator with a smart UI and live results. It offers basic, advanced, and scientific functions, a history log, customizable themes, and user-definable functions. It also includes features like an on-screen timer and iPad multitasking support.
This utility app provides a clear and intuitive way to perform calculations, showing the entire process for better understanding. Users can personalize the interface by changing the color theme to match their preferences.
