I have a blackberry and use the bb travel app. I booked a long weekend in Amsterdam today, It picks the info up from my emails and stores it. So, although I booked flights and apartment separately, it stores it under the one trip. It alerts me to changes in flight status. It also has a currency converter, world clock and weather section. It probably does a lot more but that's all I use it for.
I also have the BA app. It texts me as soon as the flight opens for check in. Can be handy if you want to book specific seats. I can also check in when I'm away. My ticket can be stored on my phone and I can show that at check in. I haven't actually done that yet
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