zlacker

>>Techno+(OP)
There is an app called 'PetrolPrices' which seems to have a pretty complete price database. It's much better than this government API so far.

>>london+7d
That's often out of date, and the UI is pretty buggy (at least on iOS).

There's also 'Gaspy' which is really a NZ app that was very popular in NZ (I used to live there) where people submit and confirm prices, but in the UK there aren't that many users (hasn't got critical mass), so there are often no prices or things are very out-of-date.