INSIDE DOSII
How Dosii Works
Understand the inputs, inspect the result, and decide whether the interface fits your workflow.
An animated walkthrough made from app screenshots, not a live screen recording.
Enter your vial and dose
Enter the vial amount in mg, the amount you want to calculate in mg or mcg, and the liquid volume in mL. Pick the matching syringe scale. These quantities come from your inputs; Dosii does not determine a dose or verify a vial's contents. Water-volume suggestions describe where the mathematical result falls on the scale, not how to prepare a substance.
See the calculated syringe line
An animated syringe presents the calculated line for your selected syringe (30u, 50u, or 100u). Below it, a card shows the mathematical result in units and mL.
Know your cost per dose
Enter what you paid for the vial. Dosii shows how many doses you get and what each one costs. That's it. Open the app, get your answer, close it.
Check an example before you buy
In a hypothetical calculation, a 10 mg vial amount and 2 mL liquid volume give a concentration of 5,000 mcg/mL. An entered amount of 275 mcg gives an exact volume of 0.055 mL, or 5.5 units on the supported U-100 scale.
The two-decimal volume display rounds to 0.06 mL. That is why independently rounding volume and units can make the numbers look different. These values illustrate arithmetic, not a recommended dose.
Follow the full calculation and rounding explanation →What stays when you close the app?
Dosii keeps your calculator state on this device. You can also save multiple named calculations, find them in Saved, and restore a setup when you need it. Saved calculations are not a dated administration log or a reminder schedule.
The iPhone app works locally without an account. Website visit measurement is separate; read the privacy details. For app questions or a correction, contact Dosii support.
Compare focused calculators and tracking apps →DOSII FOR IPHONE
Ready to see Dosii?
$9.99 once in the US store · iPhone · No subscription
Get Dosii on theApp Store · $9.99 once