Quick Mental Math Game vs LessonOS

Simple game to allow users to practice mental math. 1 minute mental math game. The user's high score is saved. They can share their score if they'd like to.

LessonOS is a simple, offline attendance and student management app for trainers, coaches, and small studios. Track class attendance, check students in with a single tap, schedule recurring classes, and manage credit packages — all on your iPhone, with no account and no internet required. Built for instructors who'd rather teach than fight a spreadsheet, LessonOS keeps your students, classes, and attendance organized in one fast, private app. WHO IT'S FOR • Martial arts schools — kungfu, karate, taekwondo, BJJ, and judo dojos tracking student attendance and class credits • Coaches and private tutors — sports, music, dance, and academic instructors managing class rosters • Gyms and fitness studios — yoga, pilates, and personal training studios checking members into classes • Any small training business that wants to replace a paper notebook or spreadsheet — without bloated, expensive studio software KEY FEATURES • Student management — add, search, and organize students with status and per-student analytics • Recurring class scheduling — set up weekly classes (e.g. Tue/Thu/Sat) and auto-generate every session • One-tap check-in — tap to check students into a class, with undo for mistakes • Attendance tracking — see who attended each class and keep an accurate roster • Credit packages — sell class passes (10-class card, 20-class card) and deduct credits automatically • Leave requests — record and approve student absences and make-up credits • Attendance analytics — spot who's showing up and who's drifting away before they quietly stop coming • CSV import & export — migrate from a spreadsheet in minutes • Backup & restore — keep your data safe with iCloud backup • 7 languages — English, Chinese, Japanese, Spanish, Malay, Indonesian, and French LESSONOS PRO • Unlimited students, classes and credit packages • Full analytics: 30- and 90-day trends, top attendees • Backup & restore to iCloud • CSV import and full data export • Kiosk mode for front-desk self check-in • Make-up credits for approved leaves • Monthly or yearly with a 7-day free trial, or a one-time Lifetime purchase WHY LESSONOS • Offline-first — works with no internet; your data stays on your device • No account needed — open the app and start; no sign-up, no email, no password • Free to start — up to 15 students, 3 classes and 1 credit package at no cost. Upgrade to LessonOS Pro (monthly or yearly, 7-day free trial) or buy Lifetime once and never pay again • Private by design — your student data is stored locally, not held in someone else's cloud • Fast and lightweight — built for trainers and instructors, not accountants Whether you run a martial arts dojo, coach a sports team, teach private music or dance lessons, or operate a small fitness studio, LessonOS gives you a clean, offline tool to manage students, take attendance, track check-ins, and sell class credits. Download LessonOS and bring order to your classes today. SUBSCRIPTION TERMS LessonOS Pro is available as a monthly or yearly auto-renewing subscription, with a 7-day free trial for new subscribers. Payment is charged to your Apple ID at confirmation of purchase (after the trial ends). Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Lifetime is a one-time purchase. Terms of Use: https://lessonos.app/terms.html Privacy Policy: https://lessonos.app/privacy.html