Planning ahead when you've have a terminal illness, or are approaching the end of your life, is called Advance Care Planning. It involves thinking and talking about your wishes for how you are cared for in the final months of your life. We created a prototype app that is a guide to understanding Advanced Care Planning for the NHS. The current system of Advance Care Planning presents such problems as cold language, hard to amend, and difficult to comprehend the consequences of some decisions. The app allows the user to see a range of decisions for present and future care and stop at any point and pick up later.