Viewer for APOD lets you view NASA's Astronomy Pictures of the Day through simple and beautiful interface. To open image for zooming, tap on it. To set desired image as wallpaper, tap and hold the image and click "Set as wallpaper".

Features:
- the latest photo will show after opening the app
- view images from the chosen day
- save images
- dedicated video player for video APODs
- zoom in photos
- load smaller or larger images
- really lightweight
- set photos as wallpaper
- share photos

Changelog:
- 1.8.4 - fixed bugs with video loading, improved speed of loading APODs
- 1.8.3 - added search function, fixed bugs
- 1.8.2 - added notifications, redesigned list, fixed issues with caching
- 1.8.1 - fixed issues with caching, changed app icon
- 1.8.0 - improved speed of the app, added weak internet mode, added support for offline usage, fixed many bugs, added better first-launch tutorial, added better settings
- 1.7.0 - added/improved lots of things, fixed many bugs!
- 1.6.6 - fixed issues with image transitions, updated libraries
- 1.6.5 - better image loading logic, removed settings, added full-screen mode for images
- 1.6.4 - fixed a bug which rendered my app unusable
- 1.6.3 - slight app redesign
- 1.6.2 - fixed some bugs, changed list appearance
- 1.6.1 - some bug fixes
- 1.6 - added widgets, fixed some bugs
- 1.5.1 - fixed swiping bugs, smaller app size
- 1.5 - improved the list, added small app tutorial
- 1.4 - added new list layout, fixed many bugs, improved some things
- 1.3 - added swipe gestures for viewing APODs from previous/next days
- 1.2 - added previews for video APODs
- 1.1 - big images are now loaded more efficiently
- 1.0 - added calendar to second activity
- 0.9 - small design change
- 0.8 - small design change
- 0.7.1 - bug fix
- 0.7 - added share function, added Polish language, fixed some bugs
- 0.6 - fixed low resolution wallpaper issue, added HD button to show images in higher resolution
- 0.5 - added set wallpaper function, fixed issue with some video APODs
- 0.4 - added date picker dialog, new icon and released on Play Store
- 0.3 - added buttons for downloading and settings, fixed bugs
- 0.2 - added YouTube player, fixed bugs
- 0.1 - first version

Source code: https://github.com/PawelPleskaczynski/ViewerforAPOD