Daylio

Daylio is the most popular mood-tracking app globally, standing out for its icon-based logging that eliminates the need for writing. Over three million users log moods daily, and the app builds patterns showing which activities correlate with better or worse emotional states. A year-long study found that 68% of users who logged for six months reported improved mood awareness. Unlike the runner-up #6 Sanvello, which requires more active engagement, Daylio’s simplicity yields higher retention rates—journaling apps typically see less than 5% daily use after 30 days, but Daylio’s is nearly 40%. Clean data exports satisfy clinical needs, and the year-in-review statistics reveal actionable insights. The tool’s power lies in its effortless utility, making it a top pick for therapists.