The check-in system is an installed product supported on four platforms: Windows, MacOS, iOS, and Android. See this article for instructions on how to download, install, and set up a check-in station.
Opening the check-in system is as easy as launching program on a computer:
Windows: double click on the program on the desktop or search for it using Windows Search in the lower left of the screen.
MacOS: double click on the program in the Applications folder or use Spotlight to locate it.
iOS/Android: open the app on the phone.
Launch it from within a browser by logging into your One Church account and then clicking on the "Check-In" button near the top of the menu. Then finally click on the Launch App button that appears in the pop up. This simply opens the product installed on the device. If the program is not installed, then nothing will happen.
Upon launch, any public events that are currently occurring will be listed to choose from. If there is only one, then it'll be automatically opened.