ClassIsland: A Cross-Platform Timetable Display for Classroom Screens

What ClassIsland Solves and Who It Serves

ClassIsland is written in C# and targets the .NET ecosystem. The repository shows three active branches: master for version 2.1 (codenamed Liliya), a 2.2 alpha branch, and a legacy 1.7 branch. This indicates ongoing development, but also a project that maintains multiple versions simultaneously, which can complicate bug reporting and feature parity. The application is distributed as a desktop app, not a web service, so each classroom screen runs its own instance. That means updates and configuration are per-device unless you build your own management layer. The README explicitly lists '集控管理' (centralized management) as an upcoming feature, so as of the latest release, you cannot remotely manage a fleet of ClassIsland screens from a single console.

How the Display and Reminder System Works

The core mechanism is a timeline of events derived from a class plan. You define a timetable with subjects, time slots, and weekly rotations. ClassIsland then computes which lesson is current and which comes next. At lesson boundaries, it triggers notifications. The README describes '强调提醒' (emphasis reminders) that can combine sound effects, visual effects, voice, and a topmost window. This is more than a simple popup; it is designed to get students' attention during transitions. The display itself is composed of 'components' (widgets) such as date, time, weather, and countdown. You can arrange these in multiple rows, enable carousel cycling, or make them scroll. This modular approach means the screen is not locked to a fixed layout. You can also set conditions to hide the timetable entirely, for example during exams, or make the window click-through so that it does not interfere with teaching software. The automation feature extends this: you can define actions that run on specific events or at specific times, such as opening a file or a webpage when the bell rings.

Getting It Running: Installation and Configuration

The README gives clear platform requirements. On Windows, you need Windows 10 or newer and the .NET 8.0 desktop runtime. macOS Big Sur 11 or later is supported, and Linux requires Debian 10 or a derivative with an X11 graphical environment. The installation steps are not fully detailed in the README; it points to the official documentation at docs.classisland.tech for setup instructions. For a typical user, you download the installer from the official site or GitHub Releases. After installation, you open the profile editor to define your timetable. The README mentions importing from Excel, CSES, or other software, and exporting to Excel. The editor supports multi-week rotations and quick time slot entry. One notable configuration detail is that ClassIsland is incompatible with window material modification tools like Mica For Everyone. If you use such tools, you must add ClassIsland to their exclusion list. This is a practical constraint that could surprise users who rely on those tools for aesthetic consistency.

The Linux and Wayland Limitation

The most significant limitation is Linux support. The README states that ClassIsland requires an X11 desktop environment and does not support Wayland. Running under XWayland is explicitly out of support scope, and some features may not work correctly. This is a real problem because many modern Linux distributions default to Wayland. If your classroom screens run a recent Fedora or Ubuntu with Wayland, you will need to switch to an X11 session or use a different tool. Even if you get it running under XWayland, the README warns that functionality is not guaranteed. For schools that standardize on Wayland, this makes ClassIsland a poor fit. The requirement is not a minor detail; it affects the core display and notification behavior. If you are evaluating ClassIsland for a Linux deployment, verify your desktop environment first and test the actual display and reminders under X11 before committing.

Customization Through Components, Plugins, and Themes

ClassIsland's flexibility comes from three layers: components, plugins, and themes. Components are the building blocks of the main display. The README lists date, time, weather briefing, and countdown days as examples. You can stack multiple components in a row, cycle through them, or make them scroll. This is useful for showing different information at different times of the day. Plugins extend the application's functionality beyond the built-in components. The README does not specify what plugins exist, but it says they allow 'highly customizing' the app. This suggests an API for developers, though the documentation is the place to look for details. Themes control the overall appearance. The application can also automatically match the system accent color, which gives a native feel. For a classroom screen, this customization matters because schools often want to brand the display with their logo or color scheme. However, the README does not describe how to create a theme or whether themes are shareable. The lack of concrete examples in the README means you should consult the docs to understand the theme format.

Weather, Automation, and Security Features

Beyond the timetable, ClassIsland includes weather information. The README mentions current weather, precipitation alerts, 6-hour and 3-day forecasts, and extreme weather warnings. It can fetch weather based on your location. This is a nice addition for schools that want to show outdoor conditions. The automation feature is more powerful: you can trigger actions on specific events or times. For example, you could open a web page when the first period starts or display a reminder before a fire drill. The README says this can improve teaching efficiency. The app also supports password authentication to protect settings and timetable configuration. This is important if students have access to the screen and could accidentally change the schedule. The reminder system includes manual bell alignment and automatic time sync, which helps keep the screen in sync with the school's bell schedule.

Maintenance, Upgrade Cost, and License Considerations

The project is under active development, with releases as recent as August 2026. The versioning scheme (2.1.1.1) suggests frequent patch releases. The README shows a 2.2 alpha branch, so new features are in the pipeline. However, maintaining multiple branches means that fixes for the 1.7 branch may not appear in 2.x, and vice versa. If you adopt ClassIsland, you should plan to track releases and test each update, especially if you rely on plugins or custom themes, as API changes could break them. The license is GPL-3.0. This means if you modify the application and distribute it, you must release your changes under the same license. For a school that just uses the software as-is, this has no practical impact. But if your IT team plans to customize the source code and deploy it across many machines, you need to be aware of the copyleft obligations. The README does not mention any commercial support, so you are on your own for troubleshooting, though the community channels (QQ groups and GitHub issues) are available.

Alternatives and When to Choose Differently

A common alternative is a static web page or a slide deck that shows the timetable. That approach has no dynamic reminders, no weather integration, and no automation. Another alternative is a full digital signage platform like Xibo or Screenly, which can display content on a schedule but is not designed for school timetables and does not understand lesson periods. The key difference is that ClassIsland is purpose-built for the classroom context: it understands what a period is, when it starts and ends, and how to handle weekly rotations. A digital signage tool treats the timetable as just another piece of content, so you would have to manually update it when the schedule changes. ClassIsland's import from Excel and CSES makes that update easier. If your school already uses a student information system that exports timetable data, ClassIsland's import feature is a strong reason to choose it over a generic display tool. But if you need centralized management across many screens, a signage platform with a web console might be a better fit, even though it lacks the classroom-specific features.

Editorial conclusion

Adopt ClassIsland if you manage a classroom or lab with a dedicated multimedia screen on Windows 10 or newer, and you need a customizable timetable display with reminders, weather, and plugin support. Do not adopt it if you rely on Wayland on Linux, use window material modification tools, or need centralized management today, as that feature is still marked as upcoming. Before deployment, verify your .NET 8 runtime, check that your Linux environment is X11-based, and test the Excel import and automation features against your actual timetable data.

Official sources

1. Official documentation
2. Official README
3. Project repository
4. Release notes