CityMapper has the most hilarious release notes I've ever read. I love getting an app updated - not because of the (awesome) new stuff they keep adding - but because I'm guaranteed a cracking read. It's interesting how writing in such a human voice builds positivity towards the app - I do think it's part of why I rate it so highly. It makes you want for a feature where you can find where the dev team are to have a pint with them...