The app will show the “self checkout” button for a band in stock on the app but you do have to be near or outside/inside the Apple store to use this method to see it in stock. Once you’re there, if they don’t have stock of the band you want, they can also check real time stock of other Apple stores nearby. I was told due to limited inventory, they are not allowing you to buy from home for later store pickup. Walking by the local store here and then checking the app showed yesterday that my size/color was in stock. That’s how I got my braided blue and my size also...and I love this band def one of my fav.