Hi, I'm Himanshu from The Highsense Technologies.
We are expertise in Android App Development.
We bidding on your project because we have developed Android app based on Online Wallpapers Loading. but, u can't handle with database. u can handle it with your Google+ Account. you can see design and app in our portfolio. named Awesome Cars Wallpapers.
We hope to see you soon. for more details please contact us. Thank you