Mental Math Interview Trainer vs Mental Math

Mental Math helps you build fast, reliable mental calculation skills through short, focused practice sessions. Whether you are preparing for consulting interviews (McKinsey, BCG, Bain), finance or tech case interviews, or any role that tests quantitative reasoning, this app gives you a simple way to drill the exact skills you need: quick multiplication, percentages, division, and growth calculations. Practice in three modes: • Speed: solve as many problems as you can before the clock runs out • Accuracy: answer a fixed set of questions and aim for precision • Custom: pick specific categories and set your own time limit Adjust difficulty from Easy to Hard and fine-tune the tolerance margin so drills match your current level. Your results are saved locally on your device so you can track progress across sessions and spot improvement over time. Features: • Short daily mental math drills designed for interview prep • Speed, Accuracy, and Custom practice modes • Multiplication, percentage, division, and growth exercises • Adjustable difficulty and tolerance controls • Session summaries and long-term performance stats • Lightweight, distraction-free design • Available in English, French, and Spanish Perfect for consulting interview prep, case interview math, finance interviews, product management interviews, or anyone looking to sharpen their everyday arithmetic.

10 minutes a day to keep your mental math sharp. Whether you're in middle school, in high school, or an adult who wants to reconnect with math, Kalc helps you forge solid mental reflexes, without cramming. Spaced repetition system (SRS): concepts you master space out over time, the ones you miss come back the next day. The method known to deliver the most learning per minute practiced. WHO IT'S FOR · UK students (Year 7-10), US students (Grade 6-9) · Other English-speaking systems (Canada, Australia, Ireland, NZ) · Spanish-speaking students (Spain ESO, Mexico secundaria/preparatoria) · French-speaking students (France, Belgium, Switzerland, Quebec) · Adults who want to get back fluency with mental math Each user picks their school system during onboarding. Content and examples adapt. WHAT KALC COVERS · Multiplication and division (times tables, decimals, signed) · Fractions (simplification, operations, fraction of a whole) · Percentages (calculation, increase, discount, compound change) · Powers and square roots · Algebra and order of operations · Addition and subtraction of signed integers TWO PRACTICE MODES · Zen mode: at your own pace, no pressure, to consolidate the basics · Chrono mode: against the clock, to build speed under exam conditions VISIBLE PROGRESS Every skill has its own level and progress bar. You see exactly where you stand and what's left to master. IN REAL LIFE Every session ends with a concrete example of how this skill serves you day to day: splitting a restaurant tab, reading a paycheck, working out a discount, planning a budget. Mental math is something you actually use. HOME SCREEN WIDGETS Track your progress straight from your iOS home screen, without opening the app. Streak, XP and skills in progress at a glance. MEASURED REMINDERS Up to 5 reminders over the first 3 weeks, off at any time. No spam, no guilt-tripping. ONE-TIME PURCHASE, NO SUBSCRIPTION Kalc is free to download (1 skill available without purchase). Full access unlocks with a single purchase (lifetime or 1 year non-renewing). No traps, no hidden paywall. PRIVACY All your data stays on your device and syncs through your personal iCloud account. No ads, no advertising tracking, no cookies. Kalc is for people who want real progress in mental math. Privacy policy: https://lmtdigitalcreations.com/kalc/privacy.html Terms of use: https://lmtdigitalcreations.com/kalc/terms.html