EyeRest is a lightweight Windows system-tray application built with .NET Framework 4.8 and Windows Forms that reminds users to follow the 20–20–20 eye-care rule. It runs in the background using a timer and delivers configurable reminders via Windows toast notifications with a tray balloon fallback. The application is session-focused, resource-efficient, stores settings locally when enabled, and collects no telemetry or personal data.