Oyster Errors • London 4+

Revealing secret error codes

Frostmd LLP

    • £1.79



Ever had your Oyster or Contactless Payment Card rejected in London?

Never be mystified by a ticket barrier error code again!

Revealing the secret error codes at ticket barrier gates on the London Underground (Tube), Overground, DLR and National Rail.

Just user the picker or type in the barrier code you received at the gate line into the App to reveal the secrets behind the numbers!

What’s New

Version 1.2.1

• minor fixes and improvements

Ratings and Reviews

3.3 out of 5
6 Ratings

6 Ratings


Needs work

Lots of missing, inaccurate or odd information. The way to browse numbers is odd and there is no search functionality if I want to search a specific number. Fine for a free app, but charging for this? No. I will get a refund.

Developer Response ,

The information in the App is complete as supplied by TfL. Not all of the codes are in use, which is why it seems as if there are gaps. You can tap the code in the top right to manually search for a code rather than using Apple’s picker. Hope this helps!

App Privacy

The developer, Frostmd LLP, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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