Hey there,
I've made TaBoSo , an iPhone app that helps a taxi driver manage his bookings and improve customer experience.
[url]appstore.com/taboso[/url]
Some of the things TaBoSo can do for you
Quick booking entry
Booking status managing
Remembers and recognises customers by name/phone number
Create text message templates, so you can quickly and politely remind customers of their bookings and/or inform them of your arrival
Automatically get a quote based on your own pricing formula
Data backs-up on your iCloud, so if you lose your phone you won't lose your bookings
You get two weeks to use the app for free and see the benefits, afterwards it works on a subscription (less then £2 / week). However, if you don't want to subscribe, your bookings information will still be available, you just won't be able to create new bookings. So try relaxed, knowing that even if you won't like it (doubtful), you won't lose any information.
If anyone's got any thought I'll be happy to help.