LIDZPEEPS

We have a website through squarespace and want to use the commerce platform to sell at a market. There will be two of us using the app. My partner is Trying to use the Squarespace Commerce POS app to check out people at a market. The Items added to cart don't show up in cart and can't check out on Android. However, on my iphone I can add items to cart, see items in cart, and checkout. Don't understand why he isn't able to do the same since we are logged in under the same account.