The iCalculator vs Primality

The iCalculator is back. A classic calculator with an intentionally retro personality, rebuilt for modern iPhone and iPad with useful everyday tools that go far beyond basic arithmetic. CLASSIC CALCULATOR The familiar calculator experience returns with: • Addition, subtraction, multiplication, and division • Percent • Positive/negative values • Decimal calculations • Memory controls • Chained calculations • Calculation history • Tactile button feedback The large circular controls and bold display preserve the spirit of the original iCalculator while the app underneath has been completely rebuilt in modern SwiftUI. QUICK TOOLS Skip the formulas and jump straight to the answer. KITCHEN CONVERSIONS Convert common cooking measurements quickly with dedicated Volume, Weight, and Butter tools. Common conversions include: • Cups • Tablespoons • Teaspoons • Fluid ounces • Milliliters • Liters • Pints • Quarts • Gallons • Ounces • Pounds • Grams • Kilograms • Butter measurements • And more Quick amount presets make common recipe conversions even faster. TEMPERATURE Convert Celsius and Fahrenheit instantly. TIP & SPLIT Enter the bill, choose a tip, and split the total between any number of people. Quick presets include: • 15% • 18% • 20% • 25% See the tip amount, total bill, and amount per person immediately. PERCENTAGE & DISCOUNT Handle common percentage problems without remembering the formula. Calculate: • X% of a value • Percentage change • Discounts • Amount saved • Final price DATE DIFFERENCE Choose two dates and see: • Total days • Weeks and days • Calendar difference in years, months, and days FUEL ECONOMY & TRIP COST Estimate fuel use and trip cost using: • MPG • L/100 km • Trip distance • Fuel economy • Fuel price HISTORY Review previous calculator operations, reuse results, delete individual entries, or clear the history when you are finished. MADE FOR IPHONE AND IPAD The iCalculator adapts to iPhone and iPad while preserving its distinctive retro calculator design. ENGLISH & SPANISH The full interface is available in English and Spanish. Calculation history and preferences stay local to your device. The iCalculator combines the personality of the original app with practical everyday tools designed to help you get an answer quickly.

The Primality App has a clean and simple, yet powerful, function: Given any integer, the app determines either that the given integer is prime or else it provides all prime factors of that integer. Very clean, very simple, focussed. The app operates in the range of 0 - 999,999,999,999. A popular feature of the app is its ability to determine the prime ordinality of each prime found, such as observing that 97 if the 25th prime. (However, this particular feature is available only up to the 100,000th prime, which is 1,299,709.) Requires iOS 13 or higher.