It’s not possible to checkout as a guest. This is because your purchases need to be linked to a Pocketmags account. This is then used to login to the Pocketmags website or apps at any time to read your digital editions. 

A Pocketmags account allows you to access, sync and read your purchases on multiple devices, such as your home computer and your Apple, Android or Amazon devices.

An account also protects all your purchases in the case of a lost or stolen device and allows you to earn loyalty points which can be used to reduce the cost of future purchases