The Citymapper Pass has been extended to include zones 3 and 4. A zone 1 and 2 version was introduced earlier this year. This offers and alternative to Oyster but is only available on a weekly basis. However, it undercuts Oyster by £4.20 for a zones 1-3 pass. There is a basic version which replicates Oyster’s reach… but also a Super Duper version which includes credit for taxis and Santander bikes. I see you can use this with a card or with the app.
Any forum members got any experience with this?