Every dose, in its time.
Koyomi means "calendar" in Japanese. Free calculators and planners for mixing and measuring, guides in plain English, and an app that keeps every vial, dose and day in one calm place.
No sign-up. Nothing you type leaves your browser.
Tools that do the maths
Each one shows its working, so you can check every number.
Dose calculator
Vial, water and your prescribed dose in. The mark to draw to out, with a picture of the syringe.
PlannerWater planner
Work backwards: pick how many units you want each dose to be, and see how much water to add.
ConverterUnit converter
mcg, mg, mL and syringe units on one screen. Type any one and see the rest.
ReferenceSyringe guide
What every line on a 30, 50 and 100-unit insulin syringe means, with tables for each.
PlannerVial supply planner
How long a vial lasts on your schedule, when it runs out, and how many a full run needs.
PlannerDose-change planner
When a dose steps up over time, see the units, doses and vials for every step.
CalculatorBlend calculator
Two peptides in one vial: what a draw holds of each, or what to draw for a set amount.
PrintablePrintable draw chart
A one-page dose-to-units table for your exact vial. Print it and keep it with your supplies.
CalculatorUse-by date
Mixing date plus storage days. Know the day to finish a mixed vial.
The app
Every dose, on time
Daily, every few days, chosen weekdays or cycles. A reminder at each time, and one tap to log.
Vials that count themselves
Doses left, use-by dates and spare stock, with a heads-up before you run out.
Sites, rotated for you
Tap the spot on a body map. The app suggests where you went longest ago.
Your patterns
Streaks, on-time rate, weight and mood trends, side effects and a private journal.
Plain-language library
What each peptide is, what research covers, and how strong the evidence is.
Private by design
No account needed. Your tracking stays on your phone.
Coming soon to the App Store and Google Play.