how to set up lockscreen and quick acces to apps
There is an app available from Google Play Store that does just that, you select the APP you want to load, the lockscreen appears, you unlock the phone and you're on the selected app.
Active lockscreen
by: Celltick last updated on July 24, 2013


Description
Active lockscreen brings together fast access to your favorite apps and full personalization features for your Android phone.
Your favorite apps, your latest contacts, your photo gallery, are available within just one click.
Active comes with hundreds of themes and appetizers available to download that let you flip through your social and news feeds directly on your home screen.
After installing, you can use one swipe on your new lock screen to:

Call your favorite numbers, recent contacts or open the phone’s dialer
View and access your personalized photo gallery
Launch recently used apps or predefined apps
Stream social media updates on your locked screen
Send text messages or communicate through Skype, WhatsApp, Viber, Email and Gmail
Launch your camera or any picture related apps such as Instagram, Mobli and more
Read personalized content that are streamed with a preview