Only Calendar helps you plan, schedule, and organize your life with clarity and confidence. Built as an open-source, privacy-focused calendar & planner app, it offers powerful tools without ads, tracking, or unnecessary permissions. Your events always stay your own.

📅 Powerful Event Management

Create events with precise controls including start time, end time, durations, notes, locations, reminders, and advanced repetition rules.
Import birthdays, anniversaries and holidays so you never miss important moments.

🔄 Sync Across Your Accounts

Seamlessly sync with:
• Google Calendar
• Outlook
• Nextcloud
• Exchange
• Local calendars and more

Your schedule stays updated across devices.

🎨 Customize Your Planner

Personalize the way you plan with:
• Custom notification sounds
• Looping audio & vibrations
• Material Design themes
• Dynamic light & dark modes
• Flexible widgets for your home screen

Widgets keep your day, week, or agenda visible at a glance.

🗂 Multiple Views for Every Planning Style

Switch effortlessly between:
• Daily view
• Weekly view
• Monthly view
• Yearly view
• Agenda / list view

Use powerful filters to find events quickly and stay organized.

🔒 Designed With Privacy in Mind

Only Calendar is open-source and built to respect your data.
No ads. No tracking. No hidden collection.
Just a clean, reliable calendar experience that keeps your schedule private.

🌍 Perfect For

Students, professionals, families, and anyone who wants a modern, intuitive calendar app that combines powerful features with a clean, privacy-respecting design.

Plan with clarity. Organize with confidence.

Only Calendar keeps your schedule simple, private and beautifully organized.