Quick Maffs vs Metis

QuickMaffs is a simple mental math app with NO ADS or PAYWALLS! Perfect for students, Quant finance interviews, or anyone who wants to improve their math skills. Features include 13 game modes of various arithmetic types, each customizable with tailored difficulty levels. Modes: Addition, subtraction, multiplication, division, squaring, doubling, halving, linear equations, quadratic equations, equation systems, mean, percentages and trigonometry. (This app is designed and maintained by Andrew Martin.)

Metis turns every word you look up into a permanent Memory Card — and resurfaces it, right when you're about to forget it, until it actually sticks. Most vocabulary apps ask you to sit down and grind through decks you didn't choose. Metis works the opposite way: you search a word because you actually needed it — in a book, a conversation, a show — and from that moment on, it's yours to keep. No lesson plans, no forced daily quotas, no gamified streak pressure. Just the words that matter to you, remembered. HOW IT WORKS • Search any word or phrase in the language you're learning • Metis instantly generates a clear meaning, a natural example sentence, and the correct translation — in both directions, so you can type in either language and it just works • Save it as a Memory Card with one tap • Spaced repetition brings it back for review right before you'd forget it — not on a rigid schedule, on the schedule your memory actually needs FOUR WAYS TO REVIEW Cards are quizzed back to you in a mix of styles, so recall stays honest instead of becoming rote pattern-matching: classic flashcards, multiple choice, meaning-to-word, and fill-in-the-blank. REAL PROGRESS, NOT A LEADERBOARD Watch your collection grow from "learning" to "learned" — track your day streak, see how many words you've learned this week, month, and year, and browse everything you've ever saved, grouped by month. No badges, no rankings, just your own vocabulary taking shape. LEARN ALONGSIDE FRIENDS Add friends and send each other words worth keeping. Take on gentle word challenges, build collections together, and see what the people you learn with are picking up — because what you learn sticks better when it's shared. BUILT TO STAY OUT OF YOUR WAY Metis is designed to feel calm — a warm, editorial look with none of the primary-color gamification most language apps default to. Organize cards into your own collections, get a gentle nudge when reviews are due, and pick up right where you left off. WORKS WITH THE LANGUAGES YOU'RE ACTUALLY LEARNING Choose your native language once, then add as many languages as you're learning — switch between them anytime. Metis is for anyone building real vocabulary in a new language: students, travelers, immigrants, subtitle-readers, and anyone who's tired of forgetting the word they just looked up five minutes ago.