Then, select Home Screen Background and choose a photo from your phone that you want to upload. Now, open the Alexa app, go to Settings, and select Your Echo Show from the list.Once you’ve entered the Background menu (as described above), select Alexa App Photo instead of Prime Photos. Alternatively, you can use the Alexa app on your smartphone or tablet.This will access your Prime Photos subscription and allow you to choose one of the uploaded and set it as the home screen on your Echo Show. From this screen, select Personal Photos, then Background, and Prime Photos.Then tap Home & Clock, and select Clock.If you are a Prime Photos member, go to Settings on your Echo Show.To add custom photos to your Echo Show device, you’re going to have to either subscribe to Prime Photos or use the smartphone app. However, you won’t be able to do this from the Echo Show itself, even if you capture a picture using its front camera. Of course, you can add personal photos and even create slideshows. If you want your home screen to stick to a particular background, navigate to the pencil icon (edit) and select a photo.Plus, every one of the 5 will shuffle through different backgrounds. If that’s not enough, how about the fact that each of these categories has even more configuration options? For instance, the Classic category comes with 5 options: Zen, School House, Stellar, and Kaleidoscope. These include Recent Clocks, Modern, Classic, Playful, Personal Photos, and Photography. You’ll see a number of different categories on the screen.Navigate to Home & Clock in this menu and then tap Clock.To change the appearance of the home screen, just swipe downwards from the top of the screen and then tap the gear icon (settings).Then the next time you open the Amazon App and tap the Sign In button the App will ask you if you want to associate the App with the password that you saved earlier, just tap Ok and touch the finger print reader and you will be logged into the App automatically. Once that's done go to Settings/Passwords & Accounts/Website & App Passwords and Tap the “+” (top right) to provide the credentials that the App needs, and type in under the Website Address and then just type in your Username and Password as Mr D suggested and you're done. The first thing you'll need to do is go to Settings and scroll down to the Amazon App on your iPhone 6 (minimum) with an 'Up To Date iOS', then scroll down to 'Use Biometric authentication when available' and turn that on as Nura suggested. 'The application keeps you logged in to your account once you log in unless you log out', but if you're anything like me and you log out every time you're finished with the App, continue reading.

Probably the most important thing to point out is Tpoccu's posting.

But it seems to be a combination of several of the answers provided above. Ok, I just figured this out (finally), 'and yes it does work'.

How to get amazon photo app