iPhone · $19.99 one-time · by Peptide Watchdogs

PepSync — know exactly what to draw.

The peptide reconstitution calculator and vial tracker for iPhone. Enter your vial and bacteriostatic water; get concentration and units to draw, then track remaining draws, discard dates, and full history. Local-first — no account, your data never leaves your phone. Research use only.

Coming to iPhone after App Store approval · $19.99 one-time, no subscription, no account.

Answer-first calculator

The number you need — units to draw — front and centre. Reconstitution math for any peptide: retatrutide, tirzepatide, semaglutide, BPC-157, and more.

Live vial tracking

Every vial with its remaining draws and discard date, at a glance — so you always know what's on hand and when it expires.

History & CSV export

A full log with calendar filtering, exportable to CSV whenever you need your records outside the app.

Local-first, no account

Everything runs on-device. No servers, no cloud, no account — your data never leaves your phone.

Try it right here

The same engine that powers the app. Enter your numbers — no download needed. Research math only.

Inputs

mg
ml
mcg
Vial:
Water:

Units assume a U-100 syringe (100 units = 1 ml). This is research math only, not dosing or medical advice.

Results

Units to draw-
Liquid volume per draw-
Concentration-
Per unit-
Draws per vial-

Round physical measurements carefully and follow your lab protocol.

Popular calculators

Retatrutide Tirzepatide Semaglutide BPC-157 Tesamorelin PT-141 See all

Frequently asked

What is PepSync?
An iPhone peptide reconstitution calculator and vial tracker. Enter vial mg and bacteriostatic water; get concentration and units to draw, then track remaining draws, discard dates, and history — local-first, no account. Research-use math and organization, not medical guidance.
How much does it cost?
$19.99 one-time on the App Store — no subscription, no account, updates included. The web calculator here is free.
Does it give dosing advice?
No. It's reconstitution and concentration arithmetic plus your own vial records, for laboratory research only — no recommendation about human or veterinary use.