A simple till
Tap the products, Kässeli adds up the total and the change. Works without the internet, too. Everything it records stays on your device — no account, no upload, nothing to sign in to. Technically it is a progressive web app (opens in a new tab): a web page a browser can install like an app, with no App Store in between.
Install Kässeli
Kässeli does not come from an App Store: you install it straight from the browser, by adding this page to your home screen. After that it opens like an app, fills the screen and keeps what it records. In a browser tab the same data can be cleared by the browser without warning.
Set the till up after installing. A home-screen app keeps its own data, separate from this tab — anything entered here does not follow it across.
Step by step, on video
From opening this page to the first sale, about a minute each. Recorded in German — the buttons are in the same places in English.
Starting Kässeli …