Lucet (formerly Tridiuum ONE) vs Calm: Which Is Right for You?
Updated September 2026
Compare Lucet (formerly Tridiuum ONE) and Calm side-by-side. See pricing, features, privacy, and evidence to find the best mental health app for you.
Our Verdict
Calm is our recommendation. Calm offers stronger evidence-based features and better overall value for most users.
Quick Comparison
Lucet (formerly Tridiuum ONE)
Lucet (formerly Tridiuum) provides a behavioral health assessment platform that uses validated instruments to generate Behavioral Health Index (BHI) scores, hel
Paid subscription
Privacy: unknown
emerging evidence
Our Pick
Calm
Calm is a meditation and sleep app with guided sessions, sleep stories, and relaxation music to reduce stress and improve sleep quality.
Free tier available
Privacy: B+
moderate evidence