Oneironaut is a free app for Android users who practice lucid dreaming. This app provides a user-friendly interface that allows you to record your dreams daily in a dream journal, keep track of the number of lucid dreams you achieve every month, set goals, find dream signs in journal entries, and more.

The app comes with a dark, night-adapted theme and offers a variety of features, including a search function, tags, voice recording, swiping between entries, custom formatting, importing from a text file, and exporting to SD card. Additionally, Oneironaut includes reality checks, audio cues, dream signs, and backup and restore data options.

Overall, Oneironaut is a valuable tool for anyone who practices lucid dreaming and wants to keep track of their progress. It is completely free and has no ads, making it a great option for those on a budget.