Hello, @C-Applegate. Thanks for adding your question here on the PayPal Community Forum.
Since Square is a different company from PayPal, their devices cannot be used in conjunction with a PayPal account or a PayPal app like Zettle. Please check out https://www.paypal.com/smarthelp/article/faq4530 for more information on card readers and other accessories that go with the Zettle app.
I hope this is helpful. Thanks for your patience during this time. Thanks for being a part of the PayPal Community!
Sincerely,
Michael
PayPal_Michael
