Initial Release v1.0.0

Stamp PDF invoices — add a customisable text stamp (label, date, colour, opacity, rotation, position) to any PDF in seconds.
Multi-page stamping — optionally apply the stamp to every page, not just the first.
Web app — runs entirely in the browser at stampmypdfs.com. No account, no upload, no installation required.
Desktop app — native builds for macOS (Universal — Intel + Apple Silicon), Windows (64-bit), and Linux (.deb / AppImage). Your file never leaves your device.
Pro license — one-time purchase unlocks the app on unlimited personal devices. License key delivered by email instantly after payment.
Offline-ready — the desktop app works without an internet connection.