aCalendar - your calendar

Contains adsIn-app purchases
101K reviews
Content rating
Everyone
10M+
Downloads
Content rating
Everyone
In-App Purchases
Learn more
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About this app

aCalendar makes your day, week, and month since 14 years!

For questions or problems see our help system at https://acalendar.tapirapps.de or contact our support at support@tapirapps.de

FEATURES
● intuitive navigation between day, week, month and agenda view
● 8 powerful widgets (NEW birthday widget with 2.9)
● multi-select with various actions (NEW in 2.9)
● export as ICS or CSV
● year view
● lots of design and view customizations
● Google Calendar management
● flexible recurrences
● birthdays from your contacts (or without contacts)
● uses Android's native calendar backend and synchronization
● moon phases
● printing
● mini month or graphical week overview in day and week view
● free with ads and some one-time IAPs

EXTRA FEATURES (aCalendar+ or as In-App-Purchase)
● Public holidays (and school holidays for some countries) - configurable in the calendar list
● More colors (theme/UI colors, background colors, calendar colors, event colors)
● Business features (Invite attendees, link contacts, free/busy, private, profiles, share as ICS)
● Tasks (manage Google Tasks or tasks from CalDAV/OpenTasks)
● No ads (removes the occasional ad)
♥ 10% for the planet! Tapir Apps is a proud sponsor of World Land Trust, Rainforest Trust and the Tapir Specialist Group.

USAGE
● move forward and backward in the calendar by swiping vertically
● switch between calendar views with a horizontal swipe (opens the day or week you start the swipe gesture on) or double-tap for day view
● tap to open a calendar event
● long-press to add new calendar event
● long-press on mini-month to go to today or jump to date
● configurable actions on 3-finger-tap, tap on title, volume buttons
● long press an event in day view to drag to a different time

PERMISSIONS
aCalendar only requests permissions needed for app functionality. aCalendar+ respects your privacy and will NEVER send any of your private data anywhere unless configured by YOU. Please contact us if you have questions about permissions.

TRANSLATIONS
aCalendar+ is translated into more than 30 languages, mostly by volunteers - please let us know if there is a bad translation somewhere or you want to add your language.

LOVE
♥ aCalendar is made with love, sweat and tears in the heart of Munich. If you like aCalendar, please rate or comment and recommend it to your friends. Also consider upgrading to aCalendar+ for extra features ♥
aCalendar - makes your day, week and month!
Updated on
Sep 8, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Device or other IDs
  • This app may collect these data types
    Personal info and Device or other IDs
  • Data is encrypted in transit
  • Data can’t be deleted

Ratings and reviews

94.6K reviews
Derrick Alcott
September 11, 2026
UPDATE: they made this app unusable. First, banner ads that popped up suddenly to trick you into clicking them were annoying. But now they force full screen ads with no x to close out and lock out your phone's navigation buttons forcing you to watch a stupid full screen ad for a minute before you can close the app. Completely unacceptable. I deleted the app and switched.
4 people found this review helpful
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Donna B. Dantzler
August 7, 2025
There is a disconnect when an upgraded device cannot access the app without paying again. Their online description says it should transfer. No such luck. I paid the $2.49 again for the additional colors on my new device. It's not cost. It's principal to make certain your apps are valid and work as stated in writing. Just know that I will not be providing any suggestions, reviews or referrals to my friends, family or followers to purchase aCalendar.
10 people found this review helpful
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A Google user
December 17, 2018
This use to be my favorite calendar app, but that was before the update. Now I can't add reoccurring events and when I edited a reoccurring event all of then vanished. Now my Google Calendar won't add events either and says Internal Error. I've tried uninstalling it but my Google calendar is still messed up. Tried reinstalling and it's still messed up. But everything is still working on my wife's phone and still showing on my wife's phone, who doesn't have acalendar. Plus she's seeing all the dates I've been trying to add on my phone. We tried unsynchronizing the phones - no difference. I really hope they get this figured out. It use to be a great app.
7 people found this review helpful
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Tapir Apps GmbH
December 17, 2018
Please reset your Android calendar storage. You have some corrupted data there. See our online help. ACalendar 1 was more robust with regard to such corrupted data.

What’s new

Welcome to aCalendar 2.9!
If you have any questions or problems, please go to MENU - HELP (or visit https://acalendar.tapirapps.de)!
As indie app studio we rely on good ratings, especially as all our upgrades are one-time purchases.
Full changelog: https://acalendar.tapirapps.de/en/support/solutions/articles/36000509331