Edifice is a GPS-enabled guide to London's architecture for iPhone and iPad.
Written with our usual rigour and insight, the app crucially knows where you are and which buildings are near.
Edifice currently features around 200 of the capital's most significant structures, ranging from the second century to the present day, with the number continually expanding.
If you'd like to learn more, visit the Edifice : London website.
Alternatively, you can read reviews and download Edifice directly from the App Store.