Launch the app, display your purchased ticket in the corresponding chat or using the menu item “Tickets” and show it to the ticket inspector. If you additionally possess a valid subscription (e.g. Half-Fare travelcard), then please also present this for inspection.
Please note: ticket inspectors are authorised to operate your smartphone themselves in order to conduct the appropriate inspection of your ticket. Tickets purchased by you are personalised and non-transferable. You must therefore provide the ticket inspector with a form of personal ID (e.g. ID card) if prompted to do so.