Enter your dose.
We do the rest.
Nettle turns your vial strength and desired dose into a water volume that lands on a clean, round-unit draw — then carries you through drawing, logging, and reminders in one flow instead of five separate apps.
The core idea
One continuous flow — not siloed tabs
Built differently on purpose
The math and the logistics, handled together
Most peptide calculators stop at a number. Nettle carries that number through the rest of the routine — and stays out of the way of decisions that belong to you and your provider.
Solve for water, not just dose
Enter vial strength and desired dose. Nettle suggests a water volume that lands on a clean, round-unit draw — instead of making you guess the water first.
Built from your own numbers
Syringe and vial graphics are generated from your actual reconstitution — not generic stock illustrations that don't match what's in your hand.
Every unit, handled inside
mg⇄mcg, mL⇄units — converted wherever they show up, so you never have to leave the app to check a number.
Trends, not decisions
Weigh-ins surface patterns worth bringing to your provider. Nettle never uses that data to suggest, adjust, or recommend a dose.
Reference library + inventory
Your active vials, at a glance
Color-coded by peptide, tracked by remaining volume and days of supply, with reminders scoped to each individual vial.
Sample data shown for illustration.
Nettle is a calculation, logging, and reference tool — not medical advice, and not a source for obtaining peptides. Tirzepatide is prescription-only in the U.S.; retatrutide and other library compounds are investigational and not FDA-approved. Always confirm doses and compound status with your prescriber or pharmacist.
Stop doing vial math on a napkin.
Set up your first vial in under two minutes.