iOS · Free · 17+
Harm Reduction:
Drug Education
Science-based psychedelic education. Harm reduction first. Now on your phone. This app does not promote, encourage, or facilitate drug use — it exists because people who choose to use substances deserve accurate safety information, not misinformation.
No accounts requiredNo tracking or analyticsJournal entries stored locally only
What's inside
Compound reference library
Detailed profiles for 23 psychoactive compounds — pharmacology, duration, risk factors, contraindications, and citations from published research.
266 clinical studies
A searchable index of peer-reviewed studies from Johns Hopkins, Imperial College London, NYU, MAPS, and more.
Interaction matrix
Check any compound pair in a color-coded 23×23 safety matrix based on published pharmacological data.
3D Molecule Studio
Interactive molecular structures for every compound — rotate, inspect, and understand the chemistry.
Private trip journal
Reflection that never leaves your device. No accounts, no cloud sync, no data collection.
Harm reduction guides
Preparation, set and setting, dosage awareness, and what to do when something goes wrong.
Grounding exercises
Evidence-informed techniques for difficult experiences — breathwork and sensory grounding.
Offline-first
The entire database ships with the app. No connection required, nothing phoned home.
Why this app exists
Harm reduction saves lives. Organizations like DanceSafe, The Zendo Project, and MAPS have demonstrated that access to accurate information reduces emergency room visits and fatalities. BTYBD puts that knowledge in your pocket.
Every data point is sourced from peer-reviewed research or established harm-reduction organizations. No anecdotes. No promotion. Just evidence — the same database that powers this website.
Privacy by design
- No accounts required
- No tracking or analytics
- Journal entries stored locally only
- No data leaves your device
- No ads, ever
Built by Traditionally Different Technology in South Dakota.
Important information
This information is for educational purposes only. Always research thoroughly, test your substances, understand legal implications, and consult healthcare professionals. Never use substances alone or in unsafe environments.