Coming soon
Stack Check
A privacy-first supplement stack calculator. Enter the vitamins, powders, and gummies you take each day — Stack Check adds up overlapping nutrients and flags potential overages against public reference limits.
What it does
Plain label math — not medical advice.
Stack Check adds up what is on the labels and compares the totals against general adult upper limits from public nutrition references. It is not a biohacking optimizer, a recommendation engine, or a medication interaction checker.
01 · Stack
Build your stack
Add each supplement and product you take, with servings per day. Toggle items active or inactive without losing them.
02 · Totals
Nutrient totals
See aggregated daily totals across your whole stack, with calm flags from “looks okay” to “over a common adult limit.”
03 · Import
Scan or look up
Scan a barcode or import from a product page, then review and edit before saving. Always shows where the data came from.
04 · References
Credible sources
Upper limits come from NIH Office of Dietary Supplements references, with citations and notes on the nutrients where form matters.
Your stack stays yours.
Everything you enter lives in a database on your device. There are no accounts and no cloud sync. Reference values are bundled with the app, and any product lookups you run are clearly labeled with their source. Stack Check is educational — not medical advice — and is built for adults 19+.
Launching soon on iOS and Android.
Stack Check is in development. Want to know when it’s live? Drop us a note and we’ll let you know.