Overall, the AWS Console app provides a simple interface for managing your AWS services. Though it lacks graphics and has a plain look and feel, it remains relatively user friendly and serves its purpose. The only gripe I have is that you must select the AWS region before logging in--a pain for admins who deploy services across multiple regions.
Since this app doesn't provide password protection, I strongly advise you enable the native Android lock screen PIN, password, or pattern on your device if you decide to use it; otherwise, anyone with access to your phone or tablet will also be able to access your AWS account. You can download the app here.
Android AWS Manager
Another free Android app (currently in beta), Android AWS Manager provides an interface to the EC2, RDS, and Route 53 AWS services. Though designed primarily for phones, it also works on tablets; it doesn't rotate from portrait to landscape orientation, however--a limitation that I found annoying when I used the app on a tablet.
Android AWS Manager supports fewer AWS services than AWS Console does, and it delivers less functionality for the services it does support (it won't allow you to create instances on Amazon's EC2, for instance). On the other hand, unlike AWS Console, Android AWS Manager supports Elastic Load Balancing (ELB), and you can switch between AWS regions while you're logged in.
This program is also not password-protected on its own, so you should enable the native Android lock screen PIN, password, or pattern to prevent strangers from accessing your AWS account. You can download the app here.
Decaf Amazon EC2 Client
This Android app enables you to manage and monitor your Amazon EC2 infrastructure from either a smartphone or a tablet; it is available for purchase from the Google Play app store for $14.16. Unlike the two free apps we've already covered, Decaf Amazon EC2 Client doesn't support other AWS services, such as Amazon RDS or Route 53. This app nonetheless justifies its price tag with features missing from its no-cost competitors.
The first time you run Decaf Amazon EC2 Client, it will quickly step you through the process of configuring it to work with your AWS account. Simply log in to AWS, and the app will access your EC2 key ID and secret access key.