A little strange and annoying with Aviary for Android is, you cannot open it by itself. It comes as a plug-in for image, so you need to select ‘Share’ or ‘Edit’ option from image gallery to launch Aviary and edit your photo (select a photo – Share or Edit – Aviary Editor)
A major advantage of Aviary Photo Editor for Android is, you can easily enhance your images from your Android device itself with some of the best stylistic filters, removing red-eye and blemish, drawing, applying text, cropping and more. Aviary Photo Editor for Android can install from Android Market (via).