You must download the 1stPayPOS app from the App Store. You can use a pre-existing Apple ID or you can sign up during the setup of the iPad.
Open the App Store.
Type in “1stPayPOS” in the search screen. No spaces or dashes.
Select “1stPayPOS — point of sale”.
From within the App Store, select the download button, which will either be a Cloud with a down arrow or a box with an up arrow.
When the download is complete, the app will appear on your iPad’s home screen.