Turn on quick tasks by going to settings > restock mode > turn it on > select site/s > press save. Make sure to have default profile/s selected with the star in the profile page so the app knows which profile to checkout with. You will now be receiving restock notifications on your phone. When you see one you want, force touch/hold on the notification and press "start task". This will launch the app and auto create/start a task using your selected profile. You may get a status of retryingATC when running for restocks which means out of stock.