A phone screen. The panel opens in a browser with an address bar. The bar lifts away. The panel shrinks to an icon and settles into a row beside other apps. A tap opens it full screen.

You tap an icon on your home screen. The panel opens with no address bar.

The admin panel is a website, not an app from a store. Installed, it opens like an app.

Install the demonstration panel What it looks like

Chrome and Edge offer to install it. DuckDuckGo’s browser cannot, and the panel says so by name.

In the browser
The panel is a website, so it first opens in a browser, with an address bar and tabs like any other.
The address bar leaves
Choose “Install”. In an Android browser it is a button or a menu item, on an iPhone “Share”, then “Add to Home Screen”.
The site gets a place
It settles on the home screen among the apps, with its own icon and name.
It opens like an app
Full screen: calendar, prices, photos, bookings. Nothing to update, it updates itself.

The panel is built for a phone

The owner panels teatro.lt and Rožių namas use today have a top bar, five tabs along the bottom and a menu in a sheet. Every target is at least 44 px for a thumb.

The demonstration’s panel on a phone: the top bar and the bottom bar of tabs. — The demonstration’s panel, made-up data.

The demonstration panel’s menu in a sheet on a phone. — The menu opens in a sheet from the bottom.

From any device

The panel is a website, not an app from a store. So it works on a phone, a tablet and a computer with the same sign-in. Nothing is tied to one device.

Change a price or close a day on your phone, and the guest sees it at once, because there is one calendar.

Install it yourself, it takes a minute

The install is real. Choose the demonstration panel and it lands on your home screen. The data is made up.

Android

The browser offers “Install”, or choose “Install” in its menu.

iPhone

Tap “Share”, then “Add to Home Screen”.

DuckDuckGo’s browser

It cannot install it. The panel says so by name.

Open the demonstration’s panel The plumber’s app

And as a separate Android app

The panel can also be packed as its own Android app (a Trusted Web Activity). It opens full screen, and its alerts carry its own icon and name instead of the browser’s.

I proved this on a Pixel with the demonstration. There is no download link: I do not hand the file to visitors. About phone alerts.

In the browser

The address bar leaves

The site gets a place

It opens like an app