Dusk Dose does the reconstitution maths for a vial you have been prescribed: how concentrated it is after mixing, how many units to draw on your syringe, and how much water to add for a clean number of units. It never suggests a dose. You enter the one your prescriber gave you.
Enter what is in the vial, the water you added and your dose. Dusk Dose shows the units and millilitres to draw, shown on a scale that fills as you type.
Pick how many units you want each dose to be and it works out how much water to mix in, then checks the draw for you.
Put several compounds in one vial. Measure the dose by one of them and see exactly how much of each of the others comes with every draw.
U-100 at 0.3, 0.5 and 1 mL, and U-40. Clear warnings when a draw will not fit the syringe, is too small to measure well, or is more than the vial holds.
Save a mixed vial and Dusk Dose tracks what is left, roughly how many draws remain and how many days it has been since mixing. Every logged draw records what it contained.
Fifty-seven peptides and related compounds with their class and regulatory status, plus live links into ClinicalTrials.gov, PubMed, Wikipedia and PubChem. Reference only, with no dosing information.
Runs on: iPhone with iOS 15 or later.
Dusk Dose is made by Dusk Engineering Services Ltd. This policy covers the Dusk Dose app for iPhone. Last updated 7 November 2026.
Dusk Dose does not collect, store or share any personal data. There is no account to create, and the app contains no analytics, advertising or tracking code.
Your vials, doses, log and settings are saved only on your phone. Deleting the app deletes them. They leave your phone only if you export or back them up and choose where to send the file.
When you open an entry in the reference library, the app asks four public services for information about that compound: Wikipedia, and PubMed, PubChem and ClinicalTrials.gov, which are run by the US National Library of Medicine. Those requests contain only the name of the compound. Like any request on the internet they come from your phone’s IP address, and those services’ own privacy policies apply to them. Nothing about your doses or vials is ever sent.
Dusk Dose is bought through the App Store. Apple handles the payment; we never see your payment details or your Apple Account.
If this policy changes, the new version will be posted on this page with a new date. Questions: info@duskengineering.services.
Email info@duskengineering.services and we will get back to you.
Dusk Dose is a maths and reference aid, not medical advice, and it never suggests a dose. Use the dose your prescriber gave you, and check every draw yourself.
Moving to a new phone: open Log, tap Back up and save the file, then tap Restore on the new phone and choose it. Your data is not synced between devices.
Refunds are handled by Apple at reportaproblem.apple.com.
Dusk Dose is up and running, with access kept private while we polish it. Leave your email and we will let you know when you can use it.