Android, iOS

Lucid Dreamer

Lucid Dreamer comes with customizable cues that help you to become lucid during sleep. It includes dream journal too. The interesting part is an online Community called Dreammunity, where you can share experiences with folks around the world. For a premium price of 7$ you can get access to features that help you form Polyphasic sleep cycle and other interesting lucid dream induction techniques.