I came across a mention of a new app from King County Library System. It is an app which records how much you read - as a motivation.
When I first checked it out, it was only available for people in the USA, but still the library staff were very kind in their comments to be via twitter.
The app is now available for people all around the world to use, and it is lovely.
Added 21 December 2013 To show how lovely they are - they sent this tweet
@ellenforsyth Aww, thanks! :) Happy to help others #TakeTimeToRead
— King County Library (@KCLS) December 19, 2013