Sleep Spark: The Sexy Way To SleepRelax. Fantasize. Sleep The Sleep Spark App is an adult wellness app that helps users to relax, then enjoy a sexy adult fantasy in your mind, and afterwards fall asleep while listening to soothing soundscapes. The app also features audio recordings for couples to enhance intimacy and connection. Sleep Spark was developed by a hypnotherapist and is intended for users who are 18 years or older. Users will want to listen to Sleep Spark as they drift off to sleep and not while doing any other activities. Sleep Spark is an app for relaxation and sleep so for best results close your eyes, lie down in a comfortable place, and enjoy your customized Sleep Spark experience.