I have recently purchased the slimline version of the Time Travel Explorer (TTX) London iPhone App. There are two versions available: the slimline version (cost £1.79) or the pro version cost (£5.49). The prices sit neatly either side of the Lonely Planet Guide to London app (cost £3.49). This is relevant because both can be used as city guides. Whereas the Lonely Planet includes entertainment venues etc, the TTX guide appeals to the historians and map geeks out there with a series of historical maps and information. These have been seamlessly integrated with a contemporary map of the city and can be viewed by dragging a slider bar (see below).
The app is a big one- 355mb- and it takes a while to download and install. This is due to a rich range of content. The 750 points of interest have extensive written information, 150 have audio guides and there are 1500 images. POIs are shown as push pins on the map;
or as part of a searchable list…
Users can therefore find places that are in their