Nan has a Droid Incredible but she's looking to change to a Windows phone. She's worried about apps not being available. Leo says that Microsoft has done a great job with Windows Phone 8, and the hardware is great with the Nokia Lumia (it has a great camera). But the issue is that Microsoft is late to the app game and developers have been slow coming to the Windows platform, especially Google.
Back to Android, the Motorola Moto X is really good, but the battery life can be a challenge if she's a heavy user. The Motorola Droid Turbo has a much larger battery.