Your calendars are everywhere. Family on iCloud. Holidays from some website. Birthdays buried in your contacts. Work on the phone. Simple Calendar brings them all together — plus your to-dos and your day counters — in one app on Android.
One app for your whole life, not just your schedule.
SYNC EVERYTHING
• iCloud — Switched to Android but your family is still on Apple? Sync your iCloud calendars directly. No bridge, no workaround.
• CalDAV — Nextcloud, Fastmail, Radicale, Baïkal, Zoho, SOGo, mailbox.org, and more. Native two-way sync, no middleware.
• Device — Your phone's built-in Google, Samsung, and Outlook calendars show up alongside everything else.
• ICS subscriptions — Follow any calendar feed. Public holidays, school terms, sports seasons.
• Birthdays & anniversaries — Pulled from your contacts automatically.
PLAN YOUR DAY
• Seven views — month, full-height month, agenda, day, 3-day, week, and year.
• Pinch to zoom the timeline, drag an event to reschedule it.
• Quick Add — type "Coffee with John tomorrow 3pm" and it's on the calendar. It understands dates, times, recurrence, and locations.
• Invite people, send meeting invitations, and RSVP to the invites others send you.
• Insights — See where your time goes: busiest days, back-to-back streaks, free blocks. Computed on-device.
GET THINGS DONE
• Tasks — A local to-do list with optional due times (shown right on the calendar), plus priority, notes, and colored categories. Works fully offline.
• Day counters — How many days since you quit? How long until your vacation? Track it with a simple "days since / days until" counter, and keep the big number on your home screen with its own widgets.
YOUR HOME SCREEN
Glance at your day without opening the app. Eight widgets, sized for every way you live.
• Today's Agenda — What's coming up next.
• Month & Month + Agenda — The big picture, with your events right beside it.
• Week & Upcoming — The days ahead, at a glance.
• Date — A clean, icon-sized date for your launcher.
• Day counters — "Days since / days until" as one big number, plus a full list of your counters. Quit smoking? Vacation coming? The number is always in view.
PRIVATE BY DEFAULT
• No account. We have no servers, so there is nothing to collect.
• Credentials encrypted with the Android Keystore (AES-256-GCM).
• App lock — Hide your schedule behind your fingerprint, face, or screen lock.
• Works fully offline out of the box.
YOURS
• Material You dynamic theming, plus light, dark, and system modes.
• Full-text search across every event and task.
• Set the app's language from Android settings — 46 languages.
All your calendars, tasks & day counters in one private app. iCloud + CalDAV.