I'm thinking of trying this method using Alarm Clock Xtreme. That way I can use one app for any number of alarms. What I intend to do is set a sound like "water" or a "bell" on the alarm and during the day before the LD attempt, play that sound many times and set a mantra such as, "when I hear the sound of...., I will realize I'm dreaming." I think that I will use a different alarm sound to initially slightly wake up, then use the sound I've conditioned myself to realize I'm dreaming as the second "going back into REM" sound that I hope will make me aware I'm dreaming. The nice thing about the app I mentioned is, you can have the sound turn off after any amount of time you'd like so you can make sure the alarm does not keep going and wake you up if you do become lucid. It seems to me that once you have the times and sounds fine tuned, this method could be a lot less disruptive to your sleep than WBTB or WILD. Unfortunately, this method could be disruptive to my wife's sleep, so I may have to try it while sleeping in the guest room.