Short-lived memory
Only the bounded current input prefix is retained in memory. Boundaries and resets discard it; typed content is not written to logs or disk.
Privacy is architecture
Your typing never needs to leave your Mac.
Upyr has no account system, cloud inference, analytics SDK, telemetry endpoint, crash reporter, advertising, or automatic update ping.
Security and advisoriesGuarded clipboard
When restoration is enabled, Upyr attempts to restore supported formats and reports platform failures. macOS temporary data is marked concealed and Copy detection uses the native change counter.
Opt-in automation
Automatic correction, modifier gestures, key sounds, and the language flag start disabled. Sound feedback receives only physical-key categories and never stores typed characters.
Verifiable controls
Open source, reproducible model generation, RustSec reporting, CodeQL, dependency review, tests, and package smoke checks make claims inspectable.
Security tooling reduces risk; it cannot prove that software is vulnerability-free. The corpus generator is the sole intentional downloader and runs only when a developer invokes it. Desktop and WASM runtime paths implement no network client.
Delivery
macOS first. One portable core.
The shared Rust engine already runs across native desktop and WebAssembly. Product polish is deliberately landing platform by platform.
PRIMARY
macOS 11+
Universal Apple Silicon + Intel app, native AppKit settings, input-source mapping, rich pasteboard snapshot/restore support, feedback, and launch at login.
Open releasesPREVIEW
Windows
Tray app, layout mapping, broad clipboard snapshot/restore support, installer, portable ZIP, and CI coverage. The settings screen-reader bridge is temporarily unavailable.
PREVIEW
Linux / X11
XKB-aware mapping, GTK tray, DEB and tar packages. The settings screen-reader bridge is temporarily unavailable; native Wayland global input awaits a portal-backed design.
ENGINE
WebAssembly
DOM-independent core and generated TypeScript contracts are ready. A browser adapter, playground, and npm delivery are next.
Public preview
Keep typing. Upyr will flip the rest.
The current macOS preview is ad-hoc signed and not Apple-notarized, so Gatekeeper may block it. You can also inspect and build every line yourself.