Beautiful Brilliant, easy and effective. Yay.
DOES NOT WORK
Not working with HTC lock screen
It does what it says
Excellent solution. Works well. Thanks.
Works... Sort of It works, but not very well. It should be more aggressive. Other apps (mainly alarm apps) add their own message to the lock screen. So if your alarm app displays the next alarm time, expect to see that message showing at least half the time, and probably more. If you see the next alarm time, hit the power button twice, slowly, and this app should have replaced the alarm app's message with its own. (This is assuming you have the "Set the message forcibly..." option enabled. If you don't, you shouldn't EVER expect to see the message from this app.) Unfortunately, if someone finds your phone, they're not going to do this, so there's less than a 50% chance that they'll see your "If you have found this phone..." message, at least the first time they turn the screen on.
2015/02/13 : 1.1.1 : Fix auto loading on restart device. Add notification for android 5.0.
2011/12/17 : 1.1.0 : Add option of setting message by each event of Screen-On/Off and Power-On.