
PepSync: Peptide Calculator
Peptide Calculator & Logger
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Free
In-App Purchases
About
Know exactly what to draw.
PepSync turns the numbers on your vial label amount, water, syringe into one clear answer: the units to draw to. Then it keeps the books: what's left in every vial, when each one should be discarded, and the schedule you built for yourself.
No spreadsheet. No napkin math. No squinting at tick marks.
ALL-NEW IN 2.0
Version 2 is a complete redesign a ground-up UI overhaul built around one idea: the answer comes first. A cleaner dark interface, a streamlined four-tab layout with a quick-add button always under your thumb, and every number you'd act on rendered in crisp monospace. Faster to read at 7 AM, faster to log, easier to trust.
THE CALCULATOR
- Answer-first: the draw-to units stay pinned while you adjust inputs
- Clean-mark check: if your numbers land between syringe marks, PepSync suggests the water amount that fixes it
- Show Math: every step of the calculation in plain English — verify anything
- Blend support: multi-component vials with per-draw breakdowns
- Reverse calc, water calc, unit converter (mcg / mg / mL / IU / units), and titration tools
VIALS THAT COUNT THEMSELVES
- Log an entry and the vial's remaining count ticks down automatically
- Discard countdown runs from your reconstitution date
- Projected-empty date tells you in advance whether you'll finish a vial before its discard day
- Multiple vials of the same compound? One wears the "in use" badge logging just works
- Optional cost tracking per vial
SCHEDULES YOU AUTHOR
- Build simple daily plans or staged ones — step changes, on/off phases, multiple compounds — entirely from your own entries
- "Up next" shows what you scheduled, when, with your rotation site
- Missed an entry? It's recorded honestly. Plans never shift and never double up
- Optional reminders that respect your privacy: lock-screen text is discreet by default
YOURS ALONE
- Local-first by architecture: no account, no server, no analytics, no cloud copy
- Your data lives in a database on your iPhone — the only way it leaves is you tapping Export
- Full backup and restore: one file, readable, yours
- Filterable history with CSV export
ONE-TIME PURCHASE
Pay once, own it. No subscription. Restore anytime on your Apple ID.
PepSync is a calculation and record-keeping utility. All compounds, amounts, and schedules are entered by you; the app performs unit math on your numbers and organizes your records. It does not provide dosing recommendations, protocols, or medical advice. For research and educational purposes only. Consult a qualified professional for health decisions.
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What's New in PepSync
v2.1
August 13, 2026
PepSync 2.0 is a ground-up rebuild: - Answer-first calculator with clean-mark suggestions and Show Math - Vial inventory with automatic counts and discard tracking - User-authored plans with stages, phases, and discreet reminders - Full history, filters, and CSV export - Backup & restore and automatic migration of your v1 data - Local-first: no account, no cloud, no subscription Questions or ideas? Support link is on the store page.
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In-App Purchases
$19.99
Unlock PepSync
Full lifetime access, no subscription






