Apps Like Three (Rule of 3 Calculator) for iPhone and iPad
Three (Rule of 3 Calculator) screenshots
Ranked alternatives
Showing 1–20 of 1,000 ranked alternatives.
Calculator - Pad Edition
Ratha Sou
Calculate in portrait, science in landscape
Perform basic calculations in portrait mode and scientific calculations in landscape. Use root, power, factorial, exponential, division, logarithm, and trigonometric functions. Features a flat UI design similar to built-in iOS apps.
Calculator⁼
Impala Studios B.V.
Calculate, edit, and track results
Calculator provides basic and scientific calculation functions. Users can access a history of past calculations for review or reuse. It includes a live currency converter for exchange rate checks.
Acc Calculator
Digital Mind Co., Ltd.
Basic calculations with paper tape
The app provides basic arithmetic calculations with a two-line display and a paper tape. It shows the calculation formula and its result simultaneously, featuring large buttons for ease of use.
Calculator₊
Impala Studios B.V.
Calculate, edit, and track equations
Perform basic arithmetic operations including addition, subtraction, multiplication, and division. Access scientific functions for advanced calculations. Convert units between different measurement systems.
Calculator with History +
Beijing Free Calculator Technology Co., Ltd.
Calculate and track financial formulas
Perform calculations a scientific featuring pi, exponents, square root, negative numbers, and logarithms. View calculation and adjust decimal places or use thousands separators. Customize keyboard colors and sounds.
Calculator with History Tape
帆 杨
Calculate, record, and customize equations
A a log of all calculations. Displays input equations and results clearly. Includes backspace function. Allows adjustable keyboard size and number font size. Supports customization of decimal places, font size for , and display format.
Dilution Calculator
Samuel Blackburn
Calculate ratios instantly
Calculate ratios by entering the desired ratio and bottle size. Determine the exact amounts of water and solution needed. Supports litres and millimetres with future unit additions. Share results or provide feedback through in- options.
Calculator‰
Tim O's Studios, LLC
Calculate with large buttons and clear display
A calculator with large buttons and a clear display for efficient calculations. Supports basic arithmetic operations. Includes a Retina Display for improved visibility.
Basic Calculator+
Christie Clark
Calculate with large buttons and clear display
A calculator with a clear display and large buttons supports functions. Switch between portrait and landscape modes on iPad. Perform simple calculations without additional features.
Calculator HD Pro Lite
Cider Software LLC
Calculate with dual-line display and multi-line input
A with dual-line display showing input and result. Supports multi-line equations and tap-to-move cursor. Saves calculation history with timestamps and labels. Allows emailing calculations and swiping to review previous entries.
Scientific Calculator Plus 991
Tran Duy
Calculate, graph, convert, solve
Allows users to perform complex calculations with a natural display that shows expressions as written. It supports fractions, roots, and exponents. The includes a graphing module for visualizing equations.
Metric Conversion tool
Wight Hat Ltd
Convert units, save time, stay accurate
Convert units between 30,000+ conversions. Switch between 160+ currencies including cryptocurrencies with live rates. Save favorite conversions for quick access. Display results in fractions when applicable.
Euros To US Dollars
Armchair Engineering
Convert currency with real-time rates
Convert currencies between (EUR) and US (USD) using real-time exchange rates. Choose the number of decimal places for precision. Perform quick conversions without additional steps.
Speedometer ⋙
Unicom TOV
Track speed, odometer, and weather
Track speed and trip data using GPS. Switch between km/h and mph. View odometer, average, and maximum speed. Check outside temperature and weather. Receive audio and visual alerts for speed limits. Use compass and customize display color.
Fraction Calculator Plus #1
DigitAlchemy LLC
Calculate fractions, add, subtract, divide, multiply, convert
Calculate fractions with addition, subtraction, multiplication, and division. Convert fractions to decimals. Adjust recipe quantities for different serving sizes. Review math problems and convert measurements between cups and teaspoons.
Calculator HD Pro
Cider Software LLC
Calculate with dual-line display and multi-line input
A with dual-line display showing input and result. Supports multi-line equations and tap-to-move cursor. Saves calculation history with timestamps and labels. Allows emailing calculations and swiping to review past entries.
Distances To
Danny Pajevic
Calculate and fuel costs
Calculate driving , flight , and fuel costs between locations. View travel time and elevation data. Convert results to miles, kilometers, meters, or feet. Find coordinates in DMS or decimal format. Display road maps for routes.
Financial Calculator: Percent
Applorium Ltd
Calculate interest, taxes, and averages
Calculate metrics with 25+ built-in tools including average share price, tax, interest, profit, markup, discount, mortgage, tip, ROI, IRR, and CAGR. Perform investment analysis and everyday percentage calculations.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.