onetimer
AlarmTimerStopwatchWorld ClockPomodoro

Guides

Step-by-step guides for using onetimer with other tools and workflows.

  • Study Timer

    Use Pomodoro focus cycles for studying and exam prep.

  • 20-20-20 Eye Timer

    Every 20 minutes, look 20 feet away for 20 seconds — use Pomodoro as the reminder.

  • Timer for Notion

    Embed a countdown timer or clock in Notion pages.

  • Timer for PowerPoint

    Named segment timers and Recently Used switching alongside your slides.

Guides

  • Study Timer
  • 20-20-20 Eye Timer
  • Timer for Notion
  • Timer for PowerPoint

Fitness Timers

  • Tabata Timer
  • HIIT Timer

Legal

  • Privacy Policy
  • Terms of Service

© 2026 onetimer — free online timers & clocks