A quick calculation is useful.
So is not starting over.
A free browser calculator is a good fit for a one-off arithmetic check. Dosii adds named saved calculations, a choice of U-100 syringe capacities and illustrated explanations available offline.
A saved setup is a record of calculator inputs, not a treatment plan or a dose log. Check it against your current instructions whenever you reuse it; a familiar name does not verify that the contents are still appropriate.
What “on your iPhone”
actually means.
- Local calculations. Calculator work and saved setups stay on your device.
- No app analytics or advertising SDKs. The app does not report your calculations to Dosii’s marketing measurement.
- No account or cloud sync. There is no Dosii sign-in or shared cloud calculator history.
- Offline use. Calculator work and the included explanations are available without a connection.
Local storage has a tradeoff. Do not rely on Dosii as a backup or cross-device sync service. Deleting the app removes its locally stored calculations.
The app may connect to its update service, and opening an external link uses your browser. This website separately measures visits, tool use and App Store clicks without sending your calculator inputs. Read the full privacy policy.
Use the free tool.
Choose the app when it helps.
If you only need one result, start with the free peptide calculator. No download is needed. Its inputs clear when you leave or reload.
If you want to keep named setups and have explanations beside the calculator, the iPhone app brings those together in one purchase. You can also compare free tools, calculators and tracking apps before deciding.
Written by Dosii, the app’s maker · September 28, 2026. Product features refer to the current iPhone app. Dosii calculates from values you enter; it does not choose a dose, verify a product or replace qualified guidance.