big O'Clock
john bogaert
About this app
- Category Lifestyle
- Age 10
- Updated Jul 14, 2025
- OS IOS
Editor reviews
Big O'Clock is a smart alarm clock and daily routine app designed to help you wake up on time and stay productive. Create ultra-reliable alarms with repeat schedules, fade-in volume, vibration, and custom ringtones. Stop oversleeping with wake-up challenges like math tasks, shake-to-stop, barcode or QR scan, and photo verification. Stay organized throughout the day with a clean bedside clock, world clock, timer, stopwatch, and handy widgets for instant access. Ideal for heavy sleepers, students, and busy professionals who need a dependable alarm clock app and simple, effective routines.
Screenshots
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How to use:
1. Install and open the app, then allow notifications so alarms can ring reliably.
2. Tap the plus button to create your first alarm, choose time, repeat days, ringtone, volume ramp, vibration, and snooze length.
3. Add a wake-up challenge to prevent accidental snoozing, then save the alarm.
4. Customize your routine with multiple alarms for mornings, workouts, or reminders.
5. Use extras as needed: add widgets for quick control, check world time, run a timer for focus or cooking, and track laps with the stopwatch.