Key takeaways
- Reko keeps a record for each vial and shows what is left after each dose.
- The reconstitution calculator warns when a draw falls between syringe markings.
- Reko converts the numbers you enter. It never suggests a dose.
- Data stays on your iPhone unless you turn on backup.
Why track a vial
A vial label and a dose log belong together. When they are apart, it is easy to lose count of what is left.
How it works
- Add the vial: the compound, the amount in it and the water you added.
- Log a dose and pick the vial you drew from.
- Reko subtracts the dose and shows what remains.
The numbers in any example are illustrations, not a suggested dose.
The reconstitution calculator
Enter the vial amount, the water and the dose you were told to take. Reko shows how far to draw. If the draw sits between two marks on your syringe, it says so, so you can change the water amount before you mix.
Open the reconstitution calculator. For units, see the semaglutide and tirzepatide calculators.
Several vials at once
Each vial has its own record, so a new vial with a different strength does not mix with the old one. Doses stay attached to the vial they came from.
Pens
For a pen, the pen calculator counts clicks. Reko does not track pen supply in the current version.
Beyond-use dates
What is left in a vial does not extend its life. Follow the label and ask your pharmacist. Storage and discard times: [verify against the product label or pharmacy leaflet]
Questions people ask
Does Reko tell me how much to draw for my dose?
It converts the dose you enter into a draw. The dose itself comes from your prescriber.
Can I fix a mistake?
Yes. Correct any dose on any date and the amount left updates.
Do I need an account?
No.
Related pages
Reko is a record-keeping tool and not medical advice.