Constructive Calculator vs HaPi Funny Calculator

Ordinary calculators round. Constructive Calculator doesn't. It computes with constructive real numbers, an arbitrary-precision engine that keeps every result exact and hands you as many correct digits as you ask for. The rounding errors that quietly accumulate in ordinary calculators simply never happen. AS MANY DIGITS AS YOU WANT A pocket calculator stops at about 15 digits and rounds off the rest. Constructive Calculator keeps every result exact, so the digits a normal calculator throws away are still there. Swipe √2, π, or any answer to pull in tens, hundreds, or thousands more, computed on demand. SCIENTIFIC KEYPAD Trigonometry in degrees or radians and their inverses, exponentials and logarithms, powers and roots, factorials, percentages, the constants π and e, and the standard normal distribution, its CDF Φ and quantile Φ⁻¹, computed to the same arbitrary precision as everything else. BIG INTEGERS, IN FULL 52! (the number of ways to shuffle a deck) prints in full, all 68 of its digits, with no scientific-notation hand-waving. BUILT FOR CLARITY A running tape of recent calculations, locale-aware digit grouping, and copy at whatever precision you need. Constructive Calculator is an independent port of Hans Boehm's constructive-reals calculator, rebuilt natively for iPhone and iPad.

HAPI FUNNY CALCULATOR Hear Every Number. HaPi Funny Calculator turns everyday calculations into a playful, interactive experience. Every button has its own icon, name, and unique sound, making even the simplest calculation more fun. EVERY BUTTON COMES ALIVE Tap a number and HaPi does more than enter a digit. Each button shows a unique themed icon, displays its name in your selected language, and plays its own sound. Tap the same button again and again to create funny sound patterns, or mix different numbers and discover your own combinations. FIVE UNIQUE THEMES Choose a world and give your calculator a completely different personality. Every theme has its own collection of icons, names, colors, animations, and sounds. ANIMALS Meet animals and hear realistic animal sounds with every tap. VEHICLES Cars, motorcycles, airplanes, police vehicles, trains, and more — with realistic vehicle sounds. INSTRUMENTS Turn your calculations into a little musical performance with different instruments and their sounds. SPACE Explore planets, rockets, astronauts, aliens, and imaginative space-inspired sounds. NEW BACK TO SCHOOL Discover fun school objects and playful sounds that bring the theme to life. FRESH THEMES & SURPRISES HaPi's themes don't stay the same forever. Seasonal and surprise themes rotate throughout the year, bringing something new to discover. Back to School, Halloween, Christmas, New Year, and other special themes can appear throughout the year. A theme may return in a future season, while another surprise theme might take its place. You never quite know what's coming next. 18 LANGUAGES HaPi speaks your language, too. Object names automatically change according to your selected language, so the words you see on screen match the language you're using. The fun follows you wherever you are. CALCULATE & CELEBRATE Why should calculations be boring? Complete a calculation and HaPi celebrates with a burst of confetti. Add, subtract, multiply, or divide — every completed calculation can end with a little celebration. KEEP YOUR STREAK GOING Turn everyday calculations into a fun habit. Track your activity, keep your streak alive, and collect badges as you complete more calculations. How far can you go? SIMPLE, COLORFUL & FUN • Fast and accurate calculations • Five unique interactive themes • A different icon and sound for every button • Smooth animations and playful visual effects • Confetti celebrations after completed calculations • Streak tracking and achievement badges • 18 language support • No sign-up required Whether you're doing quick everyday math, checking a bill, helping with homework, or simply having fun with the sounds, HaPi gives you a different way to experience a calculator. FREE TO START HaPi is free to download and includes two free themes: Animals and Instruments. Want more? Watch a short rewarded ad to unlock the full Premium experience for 30 minutes. GO PREMIUM Unlock all available themes, including seasonal and surprise themes, and enjoy HaPi completely ad-free with a one-time lifetime Premium purchase. New themes become available automatically as they arrive. HaPi Funny Calculator — Hear Every Number. ANALYTICS, CRASH REPORTING & ADS HaPi uses Google Firebase Analytics and Crashlytics to understand app usage, improve the experience, and fix crashes. HaPi also uses Google AdMob to display ads. Depending on your settings and applicable privacy choices, AdMob may use device and activity data to provide personalized ads. These services may process data in accordance with Google’s Privacy Policy. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/