ICSx⁵ – Subscribe to calendars

334 reviews
Content rating
PEGI 3
10k+
Downloads
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About this app

ICSx⁵ allows you to add/subscribe and manage external (Webcal) iCalendar/.ics files on your Android device. One-way sync to your device.

Add high days and holidays, your sports teams events, time tables of your school/university or any other event files that come in ics/ical format. The app will import these events for you and displays it in your favorite calendar app on your Android – it integrates seamlessly into your device. ICSx⁵ uses state-of-the-art technology for synchronization that provides the ability that you always have the most up-to-date version of any added calendar file. All events are perfectly delivered to you devices calendar.

* Subscribe to Webcal feeds (= synchronize at regular intervals) e.g. shared calendars from icloud.com
* You can also pick .ics files from your local device and add its events to your calendar.
* Allows to open webcal:// and webcals:// URLs on your Android web browser
* Seamless integration to other calendar apps
* Set a sync schedule
* Intelligent update checker to save bandwidth
* Authentication and HTTPS supported

We care for your privacy and have high security standards. Therefore we have made ICSx⁵ completely public and open source. No data (neither login data, nor calendar data, nor statistical or usage data) is transferred to anywhere except the chosen server. No Google Calendar or account required.

ICSx⁵ is being developed by open source enthusiasts who have also developed DAVx⁵, the award-winning open-source CalDAV/CardDAV sync adapter for Android.

Our homepage, including configuration info and FAQ: https://icsx5.bitfire.at/
For help and discussion please visit our forums: https://icsx5.bitfire.at/forums/
Subscribe to Webcal & .ics calendars and keep them up-to-date!
Updated on
16 Dec 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.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Calendar
  • Data is encrypted in transit
  • Data can’t be deleted
  • Committed to follow the Play Families policy

Ratings and reviews

317 reviews
A Google user
9 March 2020
It works for my Sonarr calendar, but once a day when it's set to automatically sync it gives me an error notification. Then when I press the notification, go in the app and pull down to refresh, it just works again.. any ideas? Thanks.
2 people found this review helpful
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bitfire web engineering
17 May 2020
This has to do with the deep doze mode of Android itself. The device sets the internal status to "Internet available" then ICSx5 tries to make a sync, but the system isn't completely ready yet and therefore the initial try to sync sometimes fails... We can't change it because we have to trust this mechanic...
A Google user
6 November 2018
Update: it works until I change my password (at the source and in ICS) then it stops updating except when I restart the phone. Support guys were great, and we decided in the end that my firewall was blocking it. Workaround is that each time you change your password you have to uninstall and reinstall.
7 people found this review helpful
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bitfire web engineering
20 October 2018
Joanna, if you change the password on your account you have to edit it in ICSdroid also, of course! Does it work when you adapt the password? If you need support please write us to play@bitfire.at. Thank you!
A Google user
12 March 2020
Unfortunalety I get connection error notifications all the time (using it to sync teamup calendars). Once a server connection is established, everything works fine. Very annoying behavior, uninstalled it again!
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What's new

https://github.com/bitfireAT/icsx5/releases/tag/v2.4.3