This isn't a standalone app. This is Unlocker for "Cracked Screen" app.
After installing Cracked Screen (Free version), this app will remove it's ADs and upgrade it to Ad-Free Pro version.
Search keyword "Cracked Screen" in android market, click other apps from this developer or use this link to find free "Cracked Screen" app:
If all ADs won't be gone you may need to restart the app or your device.