Cross-Check

Plan or log a session: add each substance and when you take it. Hit now as you dose to track your session in real time — a live "Now" marker shows how far along you are (dashed curves mean the duration is estimated). Saved in your browser, so leave it open and check whether it's safe to add the next thing.

Session log private · encrypted · on‑device

Sessions you save are encrypted in this browser only — nothing is sent anywhere, and your code is the only way in. New here? Create your journal on the Journal page (codes are generated, never guessable). Or skip this and just use Cross‑Check below.

Interaction ratings derive from TripSit; durations from our pharmacology data, overlap an estimate. Spacing reduces overlap, not interaction — MAOIs, SSRIs and long-half-life drugs persist far beyond their acute effects. Guidance only; combinations are never risk-free.