ICSx⁵ – Subscribe to calendars

Name: ICSx⁵ – Subscribe to calendars
Price: 1.99 USD
Rating: 4.366667 (325 reviews)
Author: bitfire web engineering

By: bitfire web engineering

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

Features & Capabilities

ICSx⁵ is an open-source Android app that lets you subscribe to and manage external Webcal and .ics calendar files effortlessly. It supports one-way sync, keeping your device calendars updated with events like holidays, sports, school schedules, and more. Featuring seamless integration with popular Android calendar apps, ICSx⁵ allows you to add calendars from webcal URLs or local .ics files, supports authentication and HTTPS, and offers intelligent update scheduling to save bandwidth.

Developed by open source enthusiasts behind DAVx⁵, ICSx⁵ prioritizes user privacy and security by ensuring no data is transferred except to the chosen server. Whether you are syncing shared iCloud calendars or adding custom event files, ICSx⁵ provides a reliable, privacy-conscious solution for calendar subscription on Android devices.

User Growth & Download Statistics

App Open Source Calendar

By:

bitfire web engineering

Downloads:

25,657 65

Rating:

4.37

(325) 1 new ratings

Version:

2.4.3 Last updated: 2025-12-16

Version code:

Creation date:

2015-08-24

Publisher country:

Permissions:

android.permission.READ_CALENDAR High risk
android.permission.WRITE_CALENDAR High risk
android.permission.READ_SYNC_STATS Moderate risk
android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS Moderate risk
android.permission.WRITE_SYNC_SETTINGS Moderate risk
android.permission.FOREGROUND_SERVICE Low risk
android.permission.INTERNET Low risk
android.permission.POST_NOTIFICATIONS Low risk
android.permission.READ_SYNC_SETTINGS Low risk
android.permission.RECEIVE_BOOT_COMPLETED Low risk

Size:

15.16MB

Price:

1.99

Email:

ic*****@bitfire.at

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-08

Compare stats and ranking:

Ranking

# 381,656 ▼ 1,308

Other rankings

#66 in Productivity (Paid) ▼ 30

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

bitfire web engineering

Google Play Store

https://play.google.com/store/apps/details?id=at.bitfire.icsdroid

Email:

ic*****@bitfire.at

Website:

https://icsx5.bitfire.at/

User Reviews

Users appreciate ICSx⁵ for reliably syncing ICS calendar subscriptions with frequent updates, often in conjunction with DAVx⁵. The app is praised for its simplicity and efficiency compared to native options. However, repeated issues include loss of subscriptions especially due to power-saving modes, duplicate entries when paired with DAVx⁵, problematic timezone conversions, and sometimes persistent connection error notifications. Despite these, many find the app valuable for handling calendar syncing needs not met by major providers' default solutions.

Pros

Effectively syncs external ICS calendars with Android devices, providing better and more frequent synchronization than built-in solutions.
Works well as a companion app to DAVx⁵ and integrates smoothly for calendar subscription syncing.
Lightweight, simple, and efficient app design appreciated by users.
Allows setting a general sync interval down to 15 minutes, which is superior to alternatives.
Provides error notifications for connection issues, helping users be aware of sync problems.

Cons

App sometimes loses calendar subscriptions or URLs, especially when the device enters power-saving mode, requiring re-adding the subscriptions.
Duplicate calendar entries can occur when used alongside DAVx⁵, leading to confusion with repeated events.
Timezone handling is imperfect; events from different timezones are imported without proper adjustments, causing incorrect event times.
Automatic sync sometimes fails or stops without clear resolution, forcing manual sync or app restarts.
Constant connection error notifications even when the server is reachable can be annoying and misleading to users.

Recent reviews

Excellent companion app to DAVx⁵. I use it to synchronizes a Birthday Webcal calendar that my server generates from my contacts.

Li*****, 2024-08-26

App works but one issue I can't seem to get my head around, I use DAVx and my actual calender entries from subscriptions are listed twice. Removed and added the subscriptions back, same result