Verified facts
What happened
The official Shopify Merchant Changelog says Shopify POS v11.15 introduces a persistent cart button on phones.
The button shows recently added items, item count, and running total, and confirms additions such as discounts, customers, staff, custom sales, and fees.
Staff can open the full cart from Home, Products, Orders, or Search, then return to the screen they were using after closing it.
The persistent cart button replaces the Cart tab in bottom navigation and the previous “Go to cart” bar.
Business relevance
Why it matters
For merchants using Shopify POS on phones, the change keeps basic cart visibility available across more selling screens instead of requiring staff to leave the current task to check the cart.
The confirmation messages could make it easier for staff to notice whether discounts, customer details, fees, or other changes were added, although the supplied evidence does not establish an impact on errors or transaction speed.