ICSx⁵ – Subscribe to calendars

Subscribe to Webcal & .ics calendars and keep them up-to-date!

App info

Category :

Productivity

Update :

June 24, 2025

Installs :

21,067

Developer :

bitfire web engineering

Price :

$1.99

Requires Android :

Android Varies with device

Content Rating :

Everyone

App description

Android App Analysis and Review: ICSx⁵ – Subscribe to calendars, Developed by bitfire web engineering. Listed in Productivity Category. Current Version Is v6q, Updated On 24/06/2025 . According to users reviews on Google Play: ICSx⁵ – Subscribe to calendars. Achieved Over 21 thousand Installs. ICSx⁵ – Subscribe to calendars Currently Has 308 Reviews, Average Rating 4.4 Stars

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/

What's New

https://forums.bitfire.at/topic/1990/icsx-1-8-released

* add calendar: remember redirect only when redirect is permanent
* don't follow redirects from https:// to http://
* theme and dependency updates (including okhttp 4.8.0 and ical4j 3.x)
* gzip/Brotli support

ICSx⁵ now requires Android 5. For older Android versions, please use the ICSx⁵ versions before 1.8.8 (or upgrade Android, if anyhow possible).

Rate and review on Google Play store

4.4

308 total

5 78.4

4 6.2

3 2.9

2 0

1 12.4

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

Ivan Cameron

I have setup ICSx⁵. It serves well to keep up with public holidays, etc. through WebCAL links. Support is excellent as well. Well worth its small price. I recommend it.

Aric Crosson Bouwers

This is working really well for me. There is one thing I would like to see added though. I like the option for setting a default alarm prior to each event, but to subscribe to some calendars that have wayyyy to many calendar events to want an alarm for each, but I do want to be notified of them. If there was an option for a silent popup that could easily be dismissed, and that would let me know something is coming up but didn't make all sorts of noise, that would be ideal.

Daniel BP

Does exactly what it was designed to. The only minor issue is that it raises a notification immediately after failing to sync due lack of internet. Ideally it should wait for the connection and then sync silently. Only warn the use if the connection failed with Internet on.

Carlos Munoz

It works at first but after awhile the sync stops and can't resolve the name. And the iCal events have changed but it doesn't reflect on calender in my Phone. 😭, Update - 11/2/21. Now my autosync is disabled with no reason. So I have to make manually update it. - Update 11/10/21 - I followed the instructions to make sure the app doesn't go to sleep but events that are on my calender will have been updated with new date and time won't reflect thru the app. Lost a star for it.

A Google user

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.

A Google user

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.

David Abdel-Malek

Finally, a calendar sync that works! Outlook and Google calendar share synchronization is garbage compared to this app. You can set down to a 15 min sync interval, unlike the others which seem to take 24 hours and doesn't grab all the events. This app is well worth the nominal cost.

Barney Fife

This is a great app that works very well for me. If it tries to run a scheduled sync when I don't have internet signal, it gives an error notification (a feature, not a bug), but when I'm back in signal I sync it manually and it works perfectly again.