Making a purchase
At the bottom of a product's page, you can add it to your cart or wish list, or buy it immediately with Amazon's One Click feature. Once you tap "Buy Now," (or "Two-Day Free" for Prime items) Amazon will immediately charge your presaved payment method and ship it to a presaved address.
If you'd rather review your order first, you can add it to your cart, which you can get to from the welcome screen or the cart icon in the bottom menu bar. You can then edit your items before you check out. All of the items you've added to your Amazon shopping cart via the Web or other Amazon apps will show up in the Windows Phone app. The same is true for all of your wish lists and the products you've saved for later.
Once you make a purchase, you can track your package or cancel the order before it ships.
It's worth noting that you can't purchase Kindle books, Amazon Instant Videos, or Amazon Appstore apps from the Windows Phone. You're only able to add them to your wish list.
To buy Kindle books on Windows Phone, you'll have to download the official Kindle app. Currently, Amazon Instant Videos are available for purchase only on the iOS and Android Amazon Instant Video apps, and the Amazon App Store is available only on Android.
My only complaint about the app's performance is that it can be slow. Occasionally, I noticed an obvious lag after making a selection or searching for a product, though this will vary based your phone's processor and connection speed.
Amazon Mobile for Windows Phone 8 is a must-have for anyone who comparison shops on their phone. The barcode scanner helps you find the exact product online, and the keyword search works well to find prices and information on any Amazon product. The checkout process is streamlined to make purchasing from your phone as foolproof as buying on a desktop.
The app falls short when it comes to filtering search results beyond shopping department, so you'll want to stick to Amazon.com for more intense comparison shopping instead of relying on Amazon Mobile for Windows Phone. That said, the app is well worth downloading for checking prices on the fly and the occasional can't-wait purchase.