(EDIT September 2017: whilst this article was first published in 2014, the sign-up code below still works OK so please feel free to use it.)
I have mentioned Hailo and Uber a few times on Head for Points, and a lot of readers have been able to make some good savings using the codes I featured.
I have never mentioned GetTaxi, the smaller Hailo competitor, before. It is currently offering a £10 free credit for new members so – if you are in London or heading there at some point soon – you have nothing to lose by downloading their iOS or Android app.
One advantage of GetTaxi over Hailo is that there is NO minimum fare (apart from 10am-5pm weekdays, Hailo has a minimum) and NO cancellation fees. This can be an issue with Hailo as you may want to cancel a job when, after claiming your nearest cab is 3 minutes away, your job is actually picked up by a driver 15 minutes away! (You do get a one minute window with Hailo in which to cancel after the job is accepted before the fee kicks in.) GetTaxi also allows you to book a taxi in advance.
To claim your £10 free credit, download the app and (once you have verified your mobile phone number) click on the ‘Coupon Code’ box on the menu.
Enter code GTSZFWS and £10 of credit will be dropped into your account.
One quick warning. After you’ve signed up, GetTaxi will email or text you a £5 coupon code. Do not input this into the app, as it will invalidate the £10 code if you haven’t already used it. If you have already used the £10 code, the £5 code will not work.