PaperDay is a paper-themed calendar and diary app for Android. Each day is shown as a sheet of textured paper the user can tear away with a swipe. Users decorate their days with freehand drawing (watercolor-style brushes), text notes, stickers cut from their own photos, and washi tape strips — including a "Tape Cutter" mode that uses the device camera to cut washi tape textures from the real world. Views: Day (paper card stack), Week, and Month. A home-screen widget shows today's decorated page. Features live weather, sunrise and sunset times on each page. There are NO user accounts, NO sign-up, NO ads, and NO analytics. Monetization: a single optional one-time in-app purchase "PaperDay Plus" (via Google Play Billing) that unlocks a personal monogram stamp, alternate app icons and extra paper & washi colors — no subscriptions. Permissions used: READ_CALENDAR (reads the device calendar to display events; data never leaves the device), CAMERA (only for the washi Tape Cutter and photo stickers; processed locally), approximate location (optional, used only to fetch weather). All decorations, drawings, photos and calendar data stay on the device (localStorage / app-private storage).