Terpenes matter.
Track them.
Dank Diary is a personal cannabis lab notebook built around terpene science. Log strains, COA data, effects, and taste profiles. Know exactly what works for you.
Everything a serious
cannabis consumer needs
Most strain apps are just star ratings and notes. Dank Diary goes deeper — built around the science of terpenes and lab-tested data.
COA terpene logging
Enter terpene percentages directly from your Certificate of Analysis. Track every compound, not just THC.
Terpene profile bars
Visual breakdown of each strain's terpene profile, colour-coded to your personal good/caution preferences.
Effects & taste
Log how each strain actually makes you feel and taste. Build your own personal data over time.
Strain comparison
Compare two strains side by side — terpenes, effects, taste, THC, CBD, and more.
Terpene cloud
A visual word cloud showing which terpenes appear most across everything you've logged. Tap any to filter.
Works everywhere
Desktop, tablet, and mobile. Add to your iPhone home screen for an app-like experience. Syncs across all devices.
Photos & COA storage
Attach photos of the product and upload PDF COAs alongside your strain data.
Share strains
Generate a public link to any strain and share your terpene profile with friends or your budtender.
Stats & insights
Rankings for dispensaries, brands, effects, and tastes. Avg, max, and min THC. Price breakdowns by unit. All tappable to filter your stash.
Additional cannabinoids
Log CBG, CBN, CBC, THCV, and more from your COA. Track the full cannabinoid profile, not just THC and CBD.
Time of day
Tag each strain as best for daytime, nighttime, or anytime. Filter your stash to find the right product for the moment.
AI COA import (optional)
Paste or upload a COA and let AI fill in terpenes, cannabinoids, and potency automatically. Uses your own Anthropic API key — completely optional, works great without it.
Backup & restore
Export your entire stash as a JSON file and reimport it any time. Your data is always yours.
Built for the details
Every screen designed to make terpene data easy to log, read, and act on.
Terpenes are why strains feel different
THC percentage tells you potency. Terpenes tell you everything else — whether a strain calms or energises, whether it tastes like citrus or pine, whether it's good for pain or sleep.
Dank Diary lets you build a personal terpene profile — flag which ones work for you and which ones don't — so you can make smarter choices every time.
Simple to use,
serious about data
No complicated setup. No subscription. Your data lives in your own free accounts — we're completely out of the picture.
Buy once, set up in 15 minutes
Get the app files and our step-by-step guide. Create two free accounts — Supabase for your data and Netlify or GitHub to host the app. Done.
Log your product
Add the name, brand, dispensary, product type, THC/CBD percentages, and terpene data from the COA. AI import available optionally.
Select effects & taste
After trying it, tap to select from effects and taste options. Takes 10 seconds.
Make better choices
Over time patterns emerge. See which terpenes consistently work for you. Walk into any dispensary knowing exactly what to look for.
Your data. Your account. Your control.
Your data lives in your own Supabase account — not ours. We never see it, never touch it, and have no access to it. If you ever want to stop using Dank Diary, your data stays in your account. No lock-in, no strings attached.
One-time purchase.
Free updates forever.
No subscription. No monthly fees. Buy it once, own it forever.
- ✓ All app files + setup script
- ✓ Step-by-step setup guide
- ✓ Free updates forever
- ✓ 30 days email support
- ✓ Everything in DIY
- ✓ Full setup handled for you
- ✓ Working URL + login on delivery
- ✓ 60 days email support
- ✓ Free updates forever
Questions? Email us at [email protected]
Ready to know your cannabis?
Join the waitlist for early access.