ICSx⁵ – Subscribe to calendars vVARY

bitfire web engineering

About this app

ICSx⁵ – Subscribe to calendars solves the problem of keeping track of multiple calendars by allowing users to subscribe to Webcal and.ics calendars, making it an ideal solution for individuals with complex scheduling needs. This app benefits professionals, students, and anyone who needs to stay organized across multiple calendars. Compared to alternatives in the Productivity category, ICSx⁵ stands out with its simplicity and effectiveness, although it may fall short in terms of advanced features. Overall, it is a reliable and efficient tool for calendar management.

Pros

With a user rating of 4.4/5 and over 10,000 downloads, ICSx⁵ has demonstrated its quality and reliability, making it a trustworthy choice for users.
The app's permission-free design is a significant advantage, as it ensures that users' data is protected and not shared unnecessarily.
The developer's reputation and commitment to updates, as seen on their website, contribute to the app's overall credibility and performance.
The app's offline capability and accessibility features make it a practical choice for users who need to access their calendars on-the-go.

Cons

One concern with ICSx⁵ is its limited feature set compared to other calendar apps, which may not be suitable for users who require advanced functionalities.
The app's paid model, although reasonable at $1.99, may deter some users who are accustomed to free alternatives.
Some users may experience compatibility issues with certain calendar formats or devices, which could impact the app's overall performance.

Best for: The ideal user for ICSx⁵ is a technically savvy individual, likely a professional or student, who needs to manage multiple calendars across different platforms and devices, and values simplicity, reliability, and data protection in a calendar app.

Developer Description

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

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/

Privacy

Given that ICSx⁵ requests zero permissions, it is a relatively safe and private app to use, as it does not collect any sensitive user data. However, users should still be cautious when subscribing to external calendars, as they may contain malicious links or content. To ensure maximum security, users should only subscribe to trusted calendars and keep their app and device software up-to-date.

Tips

To get the most out of ICSx⁵, users should start by subscribing to their primary calendar and then explore the app's settings to customize their experience. Additionally, users can optimize the app's performance by regularly syncing their calendars and clearing unnecessary data. By doing so, users can ensure a seamless and efficient calendar management experience.

What's New

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

Version Information

Version: -
Downloads: 10K+
Updated on: Dec 16, 2025
Released: Aug 24, 2015
Requires: Android Varies with device

Statistics

Google Play Rating History

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ICSx⁵ – Subscribe to calendars - Google Play Rankings

Rank	Country	Category	List	Change
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No ranking data available yet. Rankings are updated daily.

#29 in Top Paid Productivity in United States

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#13 in Top Paid Productivity in France

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#14

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#19 in Top Paid Productivity in United Kingdom

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ICSx⁵ – Subscribe to calendars

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AutoRemote

ICSx⁵ – Subscribe to calendars users say on Google Play

★★★★★

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.

★★★★

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.

★★★

Aaron Bauer

Issues with timezones - Any of my meetings that occur in a different timezone are imported into my calendar without applying any timezone adjustment. In other words, if a meeting is scheduled for 1pm in a timezone one hour behind me, it is added to my calendar at 1pm, when it should be at 2pm for me. I've looked at the ICS file and the time is represented as 1pm MDT, for example, so the time should have been converted to CDT, but it seems as though the timezones are completely ignored.

★★

Roxanna Mohr

I paid for this app but I have no idea what it does or what the point was of downloading it. Let alone paying for it...

★

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.