Terpenes matter.
Track them.
Dank Diary is a personal cannabis journal built around terpene science. Log products, COA data, effects, and taste — then let it learn what actually works for you.
More than a journal —
a personal feedback loop
Most cannabis apps are just star ratings and notes. Dank Diary goes deeper — built around real terpene and COA data, with a personalization layer most trackers don't have.
Learns what works for you
The more you log, the more closely suggestions track your personal response. It suggests effects and taste from a product's terpenes — based on terpene science at first, then increasingly on your own history as you log more.
Personal match scores
Every product gets a match rating — Great, Good, Weak, or Poor — based on how products with the same terpenes have rated in your history. This kicks in once you've logged a handful of rated products; before that, there's nothing to compare against yet.
Your terpene & cannabinoid response
Stats sections show which terpenes and minor cannabinoids consistently lead to your best (and worst) experiences. Like the match scores, this needs a bit of logged history first — it gets more useful the more you use it, not on day one.
Learn the science
A built-in guide to every major terpene, cannabinoid, and how your endocannabinoid system works — written in plain language, with links straight to your own logged 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 product's terpene profile, colour-coded to your personal good/caution preferences.
Effects & taste
Log how each product actually makes you feel and taste. Build your own personal data over time.
Product comparison
Compare two products side by side — terpenes, effects, taste, THC, CBD, and more.
Terpene map
A visual breakdown 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 product data.
Share products
Generate a public link to any product and share your terpene profile with friends or your budtender.
Stats & insights
Rankings for dispensaries, brands, effects, and tastes. Method and time-of-day breakdowns. Minor cannabinoid impact. A fully customisable, drag-to-rearrange dashboard.
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 product as best for daytime, nighttime, or anytime. Filter your stash to find the right one 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 and settings 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 products feel different
THC percentage only tells you potency. Terpenes, along with cannabinoids like CBD and CBG, are believed to shape the rest of the experience — whether a product feels calming or energising, whether it tastes like citrus or pine, and how it might affect pain or sleep. The research is still developing, but the pattern is real enough that tracking it is worth doing.
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 a dispensary with a better sense of 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]
Questions, answered
Who made this?
I've worked in the cannabis industry and I'm an everyday consumer myself. Most of the trackers I tried either wanted to sell my data, buried real insight under social-feed gimmicks, or just gave me a star rating and called it a day. I wanted to actually understand what works for me, keep my data mine, and skip the noise — so I built the app I actually wanted.
Do I need to know how to code?
No. The DIY setup is a step-by-step guide — you'll create two free accounts, paste in a couple of values, and copy-paste one setup script. No coding, no command line. If you can follow a recipe, you can set it up. Prefer to skip it entirely? The Pro option has us do the whole setup for you.
What is Supabase, and why do I need it?
Supabase is a free database service that stores your data — your products, photos, and settings. You create your own private Supabase project, so the data lives in an account only you control, not one we operate or have access to. It's also what lets Dank Diary sync across your phone, tablet, and computer. The free tier is more than enough for personal use.
How long does setup really take?
About 15 minutes for the DIY option if you follow the guide. Most of that is just creating your free accounts. The Pro option takes you zero minutes — you receive a working link and login, ready to use.
Is my data private?
There's no middleman. You self-host on your own Supabase account, so your data lives in a database only you control — we never see it or have access to it. We don't hold a copy of every user's data in one place, so there's no company in the middle with a reason — or a way — to sell it.
Can I move or back up my data later?
Yes. Dank Diary has built-in export and import — download everything (products and settings) as a single file any time, and restore it whenever you like. You're never locked in.
Do I have to use the AI features?
Not at all. The AI-powered COA import is completely optional. If you want it, it uses your own Anthropic account and key, billed directly by them — and you can set a spending cap. The app works fully without it; you can always enter terpenes and cannabinoids by hand.
What does it cost to run?
Nothing, beyond the one-time purchase. Both services Dank Diary uses (Supabase for your data, Netlify or GitHub for hosting the app) have free tiers that comfortably cover personal use. No subscription, no monthly fees.
What if I get stuck?
Every purchase includes email support to help you get up and running. The setup guide covers the common questions, and if something isn't working, reach out and we'll help.
Ready to know your cannabis?
Join the waitlist for early access.