Changelog · Read the Mark

1.2 · 2026-09-13

Vial Log: keep a vial after the calculator reads its mark, log each withdrawal, see the saved mark for your entered dose, what is estimated to be left and which date ends first. Stored on your device only, with backup, restore, a calendar file and a print view for your pharmacist.
Install page: how to add the site to a phone's home screen, and why that matters on iPhone.
Home, tirzepatide and HCG pages answer the questions people ask before mixing: final volume, how much water the label allows, which syringe, how compounded labels state strength.

Four mixing tools built from the FDA labels: a diluent passport for each supported vial presentation, three clocks for the dates a mixed vial and its water vial run on, a syringe lab that shows where a volume lands on each barrel, and a bacteriostatic water page that checks whether the four labels agree.
Twenty-four more conversion question pages for tirzepatide, semaglutide and insulin, thirty in all.

First public release.
Calculator for powder and liquid vials in mg, mcg or units, with the draw shown on U-100 1 mL, 0.5 mL and 0.3 mL syringes and the U-40 veterinary syringe.
Label presets for tirzepatide (Zepbound vials), U-100 and U-40 insulin, somatropin (Serostim, Zomacton, Omnitrope), HCG (Pregnyl, Novarel), mecasermin, tesamorelin, enfuvirtide, teduglutide, setmelanotide, octreotide, metreleptin, pegvisomant, vosoritide, elamipretide, glucagon emergency kits and calcitonin, each read from the FDA label on 2026-09-04 and linked on the sources page.
No semaglutide preset, because no FDA-approved semaglutide vial exists. The semaglutide page takes the concentration from your own pharmacy label.
Six conversion question pages and three printable charts.

None yet. When a report leads to a change, the problem and the fix are listed here without any personal detail.