ICSx5

Overview

ICSx⁵ is an Android app that subscribes to remote Webcal or local iCalendar (.ics) files, downloading them at regular intervals and importing events into a native read-only calendar for use with other calendar apps. It provides one-way synchronization for schedules like school timetables, sports events, or holidays. It differs from two-way sync solutions like DAVx⁵ by focusing solely on read-only iCalendar imports.¹²⁵

Key Features

• Webcal Subscription - Subscribe to remote iCalendar resources at HTTP/HTTPS URLs and sync at regular intervals.
• Local File Import - Add events from local .ics files using Storage Access Framework.
• Automatic Sync - Download and update iCalendar files on a configurable schedule.
• Seamless Integration - Import events into device calendar for viewing in any calendar app.
• URL Handling - Open webcal:// and webcals:// links directly from Android browser.
• Authentication Support - Handle username/password and HTTPS for protected calendars.
• Intelligent Updates - Check for changes to minimize bandwidth usage.
• Customizable Display - Set title and color for each subscribed calendar.

Pricing

Platforms & Requirements

Runs exclusively on Android devices. No specified minimum requirements beyond Android compatibility for Storage Access Framework and calendar APIs. Limited to one-way read-only sync; no two-way editing or CalDAV support.¹²³

Integrations & Ecosystem

• Webcal (HTTP/HTTPS iCalendar URLs)
• Local .ics files via Storage Access Framework
• Android native calendar providers
• iCloud shared calendars
• Browser webcal:// protocol

Alternatives

Reputation

ICSx⁵ is regarded as a reliable, privacy-focused tool for one-way calendar subscriptions on Android, with praise for its seamless integration and efficient syncing.¹² Users appreciate the open-source nature (GPLv3) and lack of ads or tracking.³⁵ Some note its narrow scope, recommending DAVx⁵ for bidirectional sync needs.¹⁵