The Shell Energy Top Up app is a free Android app developed by PayPoint PLC, which allows all Shell Energy customers to top up their energy accounts from anywhere with an internet connection. This app is the primary support for PAYG Smart services, which include first and second-generation smart meters. With this app, users can top up their gas or electricity accounts from their mobile devices, generate barcodes to top up their balance, and view their PayPoint top-up history.

The barcode generator feature of the app allows users to create their own barcode, which can be scanned in any PayPoint provisioned store. This feature is especially useful for those who do not have access to online banking or prefer to use cash for their top-ups. The app also provides a quick and easy way to view the PayPoint top-up history, making it easier for users to keep track of their energy usage.