There is also a centuries-old practice of lucid dreaming, known as "dream yoga", in certain lineages of Buddhism: https://en.wikipedia.org/wiki/Dream_yoga https

There is also a centuries-old practice of lucid dreaming, known as "dream yoga", in certain lineages of Buddhism: https://en.wikipedia.org/wiki/Dream_yoga https://en.wikipedia.org/wiki/Dream_yoga Looks like it can be done without an app ;-)