Fast Rust core
A native Rust core keeps event calculations and desktop behavior responsive without weighing down your system.
Sky: Children of the Light Companion
Plan every journey.
Never miss an event.
Isekai is a lightweight desktop companion for Sky players. Track recurring events, plan goals and collections, and keep important timers nearby in a local app built with Tauri, Rust, and React.
Available for Windows, macOS, and Linux. Unofficial community project — not affiliated with thatgamecompany.
Built for every Sky journey
Timers, planning, collections, and quick desktop access in one focused companion.
Always-near overlay
Keep important timers visible in a passive transparent overlay with global shortcut access.
Event countdowns
Track recurring Sky events and daily resets using Sky-aware schedules.
Planner and goals
Save goals, wishlist progress, and collection plans for the things you want to unlock.
Local-first privacy
Your planner, goals, wishlist, and settings stay on your device. No Sky credentials are required.
Collection tracking
Organize collection progress and keep the next useful target easy to find.
Cross-platform desktop app
Install Isekai on Windows, macOS, or Linux and keep the same focused experience across platforms.
Offline-friendly
Use saved settings, planner data, and event calculations without depending on a live website.
No game modification
Isekai runs beside Sky. It does not read your game data, modify the game, or connect to your Sky account.
Frequently Asked Questions
Do I need a Sky account or login?
No. Isekai does not ask for your Sky login or connect to your game account.
Does Isekai work offline?
Most features are local, including event calculations, planner data, collection progress, themes, and saved settings.
Which platforms are supported?
Isekai supports Windows, macOS, and Linux. The latest release page lists the installer formats currently available for each platform.
Why does macOS warn when I open Isekai?
Current macOS builds are unsigned. After moving Isekai to Applications, follow the one-time Gatekeeper command in the project README if macOS blocks it.
Is Isekai an official Sky app?
No. Isekai is an unofficial fan-made utility. Sky: Children of the Light belongs to thatgamecompany.
Where can I download it or get help?
Download Isekai from this page or GitHub Releases. For help, join the Discord community or message the Telegram channel linked below.