I'm going to London for a week in August. I'm looking for a good city guide to put on my BVD.

I have downloaded the folowing demos:

-London City Guide from Aramis (bad review from palmgear for new verion)

-ChoiceWay Guide to London (good review, but demo is limited)

- Lonely Planet CItySync London (looks good, but I wish it had more "tap" capabilities. Also maps are only one scale, and I haven't found a "overview" map)

- Citikey London(so-so review)

My question. Does anyone else have any suggestions for a better city guide? Any comments on any of the above city guides (if you have used the a city guide for a different city, let me know your opinion)?