Download Universal Till
Free and offline-first. Pick your device β we've guessed the best one for you.
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Android's installer will warn about "unknown sources" the first time β that's expected for an app outside the Play Store, not a sign anything is wrong. Tap through to allow it.
Windows installer, macOS app, Raspberry Pi/Linux .deb: the till opens in its own app window β no browser, no terminal. Windows: run the installer, then launch "Universal Till" from the Start menu/desktop shortcut. macOS: open the .dmg and drag Universal Till into Applications (first time, right-click β Open to clear the unsigned-app warning). Raspberry Pi/Debian/Ubuntu .deb: after sudo apt install ./unitill-pos_*.deb, "Universal Till" is in your applications menu. Portable .tar.gz/.zip archives: double-click unitill-desktop (or unitill-desktop.exe on Windows) for the same app-window experience; run-unitill.command/.sh/.bat is the alternative that opens your default browser instead. Dedicated Raspberry Pi till (no desktop needed): after installing the .deb, run sudo /usr/lib/unitill/unitill-kiosk-setup and reboot β the Pi boots straight into the till, fullscreen, no desktop at all.
See the 3 steps