ICSx⁵ – Subscribe to calendars

ICSx⁵ – Subscribe to calendars

bitfire web engineering
★★★★☆ 4.4 Productivity v2.1.1 10,000+
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Some apps are distributed as Split APKs (multiple .apk files packaged together) to optimize resources. Standard Android installers cannot open them.

1. Download Split APKs Installer (SAI) from Google Play Store.
2. Download the app archive (.apks) using the download sources listed above.
3. Open SAI, click "Install APKs", choose the downloaded archive, and click Install.

Related Applications

Version
2.1.1
Downloads
10,000+
Updated
Dec 16, 2025
Developer
bitfire web engineering
Category
Productivity
Content Rating
Everyone
Package
at.bitfire.icsdroid
Platform
Android
ICSx⁵ – Subscribe to calendars Screenshot 1ICSx⁵ – Subscribe to calendars Screenshot 2ICSx⁵ – Subscribe to calendars Screenshot 3ICSx⁵ – Subscribe to calendars Screenshot 4ICSx⁵ – Subscribe to calendars Screenshot 5ICSx⁵ – Subscribe to calendars Screenshot 6

What's New

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

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/

How to Download ICSx⁵ – Subscribe to calendars APK

  1. Enter the package name at.bitfire.icsdroid on the APK Downloader.
  2. Select your device architecture (ARM64 recommended for modern devices).
  3. Click Download to get the merged APK file.
  4. Transfer and install the APK on your Android device.
  5. Keep Updated: Visit APKDER.COM regularly to search for and download the latest secure versions of your favorite apps.

Security & Signature Verification

This APK download is 100% safe. We verify that the cryptographic signature of the file matches the official developer credentials. No modifications or adware are injected.

Identity Special Access
  • find accounts on the device
Calendar Basic Access
  • read calendar events plus confidential information
  • add or modify calendar events and send email to guests without owners' knowledge
Contacts Special Access
  • find accounts on the device
Photos/Media/Files Basic Access
  • read the contents of your USB storage
Storage Basic Access
  • read the contents of your USB storage
Other Basic Access
  • view network connections
  • create accounts and set passwords
  • full network access
  • read sync settings
  • run at startup
  • prevent device from sleeping
  • toggle sync on and off