Best Off-Grid System Calculator Apps

Optional RPN modeMultiple undo and redoUnit conversions and constants

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.

(214)

Standard and scientific calculator modesCustomizable look (iPad only)Portrait and landscape orientation

Calculator!

by 7th Gear

$0.99

This app offers a versatile calculator experience with both standard and scientific modes. Customize its appearance, use it in any orientation, and access additional tools like a notes tab and calculation history. It's designed for students and professionals needing accurate calculations.

(4.3K)

Fraction, Scientific Calc +

Calculator⁼

Basic & Scientific CalculatorLive Currency ConverterHistory Tape

This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.

(358K)

Calculator with History +

No ads & Scientific calculator

Ad-free experienceCalculation historyVisual input

This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.

💰 Finance

(25K)

Touch-based graphing and editingNatural textbook notation inputAdvanced math and statistical functions

GraphNCalc83

Graphing calculator

$12.99

This app offers a powerful graphing calculator experience with touch-based input for enhanced interaction. It supports natural textbook notation, advanced math functions, and various plotting capabilities. Users can also utilize its programming features and built-in tools like unit conversion and a periodic table.

A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.

Optional RPN modeMulti-line displayExtensive unit conversions

(770)

Sci:Pro Calculator

by Jerry Montgomery

Multi-mode calculator (Basic, Scientific, Programmer)Calculation historyShare results via email

This app offers a versatile calculator with three distinct modes: Basic, Scientific, and Programmer. It provides a history view, sharing capabilities, and supports various input and output formats. The app is designed for iPhone, iPad, and iPod Touch.

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.

Customizable themes and colorsDual-line displayCalculation history

Big Button Calculator Pro Lite

(3.1K)

ad-supported

Easy Basic Calculator

Large buttonsDual-line display18 color themes

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.

Desmos Scientific Calculator

(14K)

ad-supported

by Desmos

Basic arithmetic operationsTrigonometric functionsStatistical calculations

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.

📚 Education

(332)

free

Conversion Calculator Units

Unit Conversion Calculator All

Converts over 140 unitsSupports 12 conversion categoriesCustomizable themes

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

(4.8K)

Calculator HD++

by smalltech sarl

High precision calculation engineResults displayed while typingMultiple undo functionality

This application offers a high-precision calculation engine with a user-friendly interface. It allows for real-time result display as formulas are typed, supports multiple undo actions, and enables easy switching between workspaces. Users can also access persistent history, print calculations via AirPrint, and share history via email.

Basic « Scientific » Advanced

(277)

ad-supported

CALC Smart Calculator ±

Real-time resultsUnit and currency conversionsCustom functions and constants

$5.99 | 100% OFF

This app offers a versatile calculator experience with basic, scientific, and advanced modes. It features real-time results, unit conversions, custom functions, and a shareable history. Optimized for various Apple devices, it's designed for ease of use by students, professionals, and scientists.

(2.4K)

Wire Gauge Calculator: Cable

12V Electric System Planner

Solar System Calculator

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.

Customizable themes with gradients, colors, or photosMultiple button shapes and color customizationDual-line display for input and result

(2.1K)

Advanced symbolic calculator

Calca

$9.99

This app is an advanced symbolic calculator and text editor. It solves equations, simplifies expressions, and allows you to explain your work alongside calculations. Calculations update instantly as you type, and all data is stored as plain text for easy sharing and device syncing.

Symbolic calculationEquation solvingExpression simplification

📊 Productivity

(153)