hi i use 2 apps which helped to to achieve 2 lucid dreams! one is "Sleep Check Reminder" what is does is, it plays sound every interval of minutes .. you can set like 3 mins etc. I used it so often that in my 2nd lucid dream i did reality check and it worked! 2nd is "Lucid Dreamer" it has a moon logo. how it works is: you have to set the timing double it will take you to sleep. Suppose if it will take 30 mins to sleep set it 60. Set the volume level that won't disturb your sleep but will make awake your subconscious mind. They both work