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.
Response from developer
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!