Supplements · peptides · journal · genetics · Apple Health
Know what your stack is doing
Stack Precision is a supplement and peptide tracking app that analyzes your supplements, journal, genetics, and Apple Health data together to show what your stack is actually doing. Always free.
A weekly read, drawn from your own entries and written in the app's own words.
Capture in seconds
Log everything you take in seconds
The analysis is only as good as the record behind it, so logging is built to take seconds, not minutes.
Tap a dose
Everything you take, supplements to peptides, sits on one daily timeline. One tap logs it.
Dictate a journal entry
Talk through your day and your spoken entry is structured as you talk, ready for you to confirm.
Scan a bottle
Point your camera at a label and the name, brand, and dose fill themselves in.
Snap a plate too, and the meal lands in your record read down to its ingredients and portions.
See what actually holds
Find out what to cancel and keep the money
Most apps remember what you took. Stack Precision tells you what it's doing. Put a hunch on watch and it holds that hunch for weeks against your own entries, then closes it with an answer. Sometimes it holds, and sometimes the pattern just isn't there to call either way.
Free, plainly
Always free, with no trial clock
Tracking your supplements, peptides, and journal is always free, with a fresh AI insight every week, not a countdown to a paywall. Base and Plus exist when you want Apple Health and your genetics folded into the analysis, research runs, and more AI use.
See what's in each tier →Go deeper on your own terms
Two ways to read your data closer
Every answer is built to be checked. The evidence is first your own record: your supplements, peptides, journal, and Apple Health data. When genetics are involved, published studies join it, cited so you can read them yourself.
Research desk
Ask a question about your own body in your own words and get an answer built from your data and the literature, citing the specific published studies it drew from.
The research desk →
Genetics
Upload the DNA test you already paid for. It is read as evidence inside the analysis, and every genetic insight cites the specific published studies it drew from.
Your genetics →In their words
From the App Store reviews
Pretty great
Signed up for the beta and used it. Still learning but have been taking supplements for years but mostly guessing. This app uses your actual genetic data to help you understand what works for your body specifically. The AI connects dots between your genes and supplements that I never could of figured out on my own. Really wish I had this sooner
Perimenopausal support
Been looking for a way to keep track of all my supplements, vitamins, and hormones to understand how my mood and energy changes. This is def easy. Also uploaded my genetics and the AI chat helped me think of questions to ask my doctor during my next visit. V cool.
Very cool tool
This app is really informative. It's very easy to add whatever supplements you're taking to your profile. All you do is scan the barcode and all the info comes up including dosage, what kind of tablet and main ingredients. I also really like the daily journal entry option. I can't wait to see what other benefits come about once I've been using it for awhile!
Why it exists
A tool built for its own maker
Stack Precision is built by Jeff Goodman, a solo developer running a long stack of his own. He wanted straight answers about what was working and what wasn't, couldn't find a tool that gave them, and built the one he needed. You are using the same instrument he uses.
More about the build →The answer is in your own data
Log tonight and see what your own entries have to say.
Always free. On iOS and Android.