ICSx⁵ – Subscribe to calendars

🇺🇸 United States
bitfire web engineering  | 
36
ASO score
Text
33/100
Reviews
60/100
Graphic
40/100
Other
0/100
rating
App Rating
4.1
rating
Votes
21.76K
rating
App Age
10y 4m
rating
Last Update
Mar 01, 2023

Compare with Category Top Apps

Metrics
Current App
Category Top Average
Difference
Installs
22.8K
477.5M
-100%
Rating
4.17
4.47
-7%
Number of Ratings (Voted)
10K
219.5M
-100%
App Age
10y 3m
6y 12m
+47%
Price
$2
$0
In-app Purchases Price
$0
$87
Update Frequency
1018d
191d
+434%
Title Length
30
25
+20%
Short Description Length
66
72
-8%
Description Length
1 688
3 137
-46%
Number of Screenshots
872
1313
-34 %
Has Video?
No
0% has videos
Size
0MB
0MB

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Downloads

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Total
22.7K
Last month icon
Last month
269

Text ASO

Title (
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ICSx⁵ – Subscribe to calendars
Short Description (
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Subscribe to Webcal & .ics calendars and keep them up-to-date!
Description (
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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/}
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Rating & Reviews

Reviews Overview
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Rating
4.1
21 757 voters

Some Latest Reviews

Alexander Seidel
02 Oct, 2025
5
endlich unabhängig von anderen Anbietern, super App :)
Don Day
01 Oct, 2025
3
the app fails to install on my nothingphone 2a. it used to work then disappeared at once from my phone and now the install fails both on fdroid and playstore
Oliba
30 Sep, 2025
5
Läuft hervorragend und tut was es soll. Für alle mit dem beschriebenen HTTP 500 Fehler (geteilte MS Kalender): mit Änderung des User Agents z.B. auf Chrome läuft es bei mir.
JF D
05 Sep, 2025
4
L'application permet de synchroniser des calendriers apple, mais dans mon cas elle fonctionne seulement pour deux calendriers sur trois. Pour celui qui ne fonctionne pas, après avoir rentré l'adresse webcal j'ai le message d'erreur length=0; index=0 . Dommage ! J'ai communiqué mon calendrier comme ils me l'ont demandé mais je n'ai vu aucune amélioration. Cela dit après 6 mois le calendrier s'est mis a marcher. Ils ont du faire une mise à jour et depuis cela fonctionne !
Mathias Kuhn
27 Aug, 2025
3
Habe seit kurzem wie andere auch einen http 500 Fehler. Bisher hat die App tadellos funktioniert, seit kurzem kommt der Fehler. Es ist ein Outlook Kalender (Office365). Die ICS Datei kann man unter dem genutzten Link nach wie vor händisch herunterladen. Im icsx5 Forum wird dieses Problem diskutiert, tritt wohl bei Microsoft Kalendern auf, da Microsoft wohl vor kurzem hier was geändert hat.
Lennart Beneke
22 Aug, 2025
1
Bisher immer super, aber seit ein paar Tagen gibt es beim synchronisieren mit einem Outlook Kalender immer einen 500er Fehler. Der Link zum Kalender funktioniert auf jeden Fall, also liegt es wohl an der App.
Ivan Cameron
13 May, 2025
5
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.
Thomas Pfister
11 Apr, 2025
1
Leider funktioniert die Synchronisation im Hintergrund bei meinem Samsung S23 Ultra nicht. Ich darf die Synchronisation immer händisch anstoßen. Die Hintergrundaktivität wurde erlaubt.
Kisu
03 Jan, 2025
5
Works very well with Proton Calendar. I can sync Proton Calendar with Samsung Calendar and see my events on my Galaxy Watch.

Other

Additional Information
Rating:
4.12
Voted: 21.76K
Google Play Link:
Price: 2.26 $
Website:
Email:
Privacy Policy:
Categories: Productivity
Size: -
Installs: 22.71K
App Age: 10 years 4 months
Release Date: Aug 24, 2015
Last Update: Mar 01, 2023
Version:
Version history
Mar 01, 2023
2.1.1: fixed a problem with migration<br><br>https://github.com/bitfireAT/icsx5/releases/tag/v2.1<br><br>* Android 13 compatibility<br>* [NEW] Add custom alarms to events that don&#39;t contain an alarm when downloaded<br>* Subscriptions are now handeled in our own database<br>* Subscriptions can now be backed up via Android Backup API<br>* Raise importance level of notification when unknown certificates are encountered<br>* improved handling of events that come from the server containing errors
Varies with device
Jan 05, 2021
https://forums.bitfire.at/post/13700<br>* Save/repair sync intervals at app start and reboot<br>* BatchOperation: fix back references when the transaction has to be split multiple times
Version history