Remember Flow, Amazon's augmented reality shopping aid that kinda sorta worked? Well now you don't have to, because the functionality has been rolled into the main Amazon shopping app. Now you can scan barcodes and even full products (at least some of the time) to compare their prices to everyone's favorite online megamart. And incidentally, you don't need a second app to do it.
The Flow features work best with a barcode, but the camera scanner will try to identify anything. Products with clear logos or easily-recognizable labels, like DVDs or cereal boxes, work best. For example, Flow can't recognize a white Nexus 5 sans packaging, but it managed to spot the NVIDIA SHIELD from the printed photo on the retail box. It can also recognize phone numbers and web addresses. At the moment, Flow and barcode scanning is restricted to the United States Amazon catalog, and you need Android 4.0 or higher to use it. The previous Flow app hasn't been updated in more than six months, so it's probably not being actively developed.
The other changes to the app are minor. Amazon India customers can now get delivery status alerts, and permissions for phone status and local storage have been added to better support Chinese Android devices.