Make LockScreen (To-do List & Weather) is a powerful yet easy to use task manager for your daily life. Addition, use LockScreen To-do, you can customize your iPhone's lock screen to display todo list and current weather.
Features:
* Smart listings.
* Pre-alerts.
* Sound notification.
* Live app badge updating.
* Smart lock screen wallpaper maker.
* Hi-Res graphics for retina display.
* Predefine 100+ HD wallpapers for iPhone 4 (640 * 960).
* Support 80,000+ different weather locations.
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How to set Lock Screen
Settings -> Wallpaper -> Camera Roll -> Choose image -> Set -> Set Lock Screen