TimerO - Exam & Classroom Timer

Professional exam & classroom timer with high-contrast display. Ideal for projectors, teachers, and students.

EXAM TIMER FOR EDUCATORS AND BEYOND A powerful, classroom-optimized countdown timer built for teachers, invigilators, and test centers — with enough flexibility for anyone who needs a professional, distraction-free timer. The large, high-contrast display is designed to be read from the back of any classroom or projected onto a screen. ✨ KEY FEATURES • Customizable title — click the title to rename it (e.g., "Year 11 Final Exam", "SAT Practice") • Multiple subject cards — add separate countdown cards per subject, each with its own Subject, Grade, and Booklet Pages • Edit cards on the fly — tap the ✏️ icon to update a card without stopping the timer • Large labeled countdown — digits show HOURS · MIN · SEC at a glance from any seat • Visual progress bar with smart color warnings: — 🟢 Green: More than 20% time remaining — 🟡 Yellow: 20% or less remaining — 🔴 Red: Final 5 minutes • Duration display — always shows the total exam duration alongside the timer • Audio alarm when time expires • Multilingual support — English, Arabic (RTL), French, and Spanish; exam rules auto-translate to the selected language • Editable exam rules — customise the on-screen rules shown to students; saves per language • 4 visual themes — choose the look that suits your display • Upload your school logo — replaces the default icon with your institution's branding • Screen wake lock — prevents the display from sleeping during an exam • Fullscreen mode — one click for maximum visibility • Works completely offline — no internet connection ever required • No data collection — 100% private, all settings stored locally on your device 💡 PERFECT FOR • Classroom exams and quizzes • Standardised and competitive testing • Study sessions and homework timers • Workshops, seminars, and presentations • Time-boxed group activities • Any timed activity in a classroom or hall 📽️ PROJECTOR-OPTIMISED Designed to be visible from every seat: • Extra-large high-contrast countdown digits • Clear HOURS / MIN / SEC labels • Bold progress bar that changes colour as time runs out • Optimised for 1280×800 and above (projectors and monitors) 📊 HOW TO USE Click the extension icon → Open Timer Enter Subject, Grade, and Booklet Pages (all optional) Click Add Subject / Grade to create a card Set the duration using the Hours / Minutes / Seconds picker Click × to close the setup panel Click START — the timer runs! Need to edit a card while the timer runs? Tap ✏️ on any card, make changes, then click Update Card. The clock never stops. 🔒 PRIVACY FIRST • No data collection or tracking • No analytics, no ads — ever • No account required • No internet needed • Everything stored locally on your device Created by educators who know that a simple, reliable, visible timer is all you need.