American Express has released an important update to its Windows Phone app. No longer Amex Mobile, the app is now just called American Express. It also seems like this is a full-fledged native application, where the previous version was a simple web wrapper.
In this updated American Express app, you have access to your Membership Rewards points, which you can use towards a number of products and gift cards. And of course you can make quick payments and check your activity.
You'll find the new American Express app now on the Windows Store. Do note that on the store, the app still seems to be called Amex Mobile, however, the name and interface changes are apparent once you download the app.
Thanks to PST on Twitter for the tip!