PepSync app icon FOR iPHONE · LOCAL-FIRST · VERSION 2.1

Know exactly
what to draw.

PepSync turns vial, water, and dose into one clear answer — draw to 10 units — then tracks what's left in every vial, when to discard it, and the schedule you built. No spreadsheet. No second-guessing the tick marks.

Coming Soon See how it works
$19.99 once — no subscription No account, ever Data never leaves your phone
PepSync calculator showing a clean 10-unit syringe draw
Answer-first calculatorThe units to draw, before anything else. The math is one tap away if you want to check it.
Vials that count themselvesLog a dose; PepSync tracks doses left, discard dates, and whether you'll finish in time.
Plans you authorYour doses, your days, your stages. PepSync just remembers and reminds — it never prescribes.
The calculator

Stop doing syringe math on a napkin.

Enter what's on your vial label. PepSync answers in the unit that matters — where to draw to — and flags when your recipe lands cleanly on a syringe mark.

The answer never scrolls away.

The result pins to the top while you adjust inputs. Change the water, the dose steps in whole syringe units, and every downstream number — concentration, doses per vial — updates live.

  • Clean-mark check: lands between ticks? PepSync suggests the water amount that fixes it — "try 2.35 ml for a clean 10u."
  • Show math: all four steps in plain English, because you should never have to trust a number you can't verify.
  • Blends, reverse calc, water calc, unit converter, and staged Plans included.
DRAW TO✓ Clean mark
10units · U-100
5 mg ÷ 2 ml = 2.5 mg/ml · 25 mcg/unit · 20 doses
020406080100
250 mcg ÷ 25 mcg/unit= 10 units
Tracking

Every vial, accounted for.

Save a calculation and it becomes a living vial: each logged dose ticks the count down, the discard timer runs from reconstitution day, and PepSync cross-checks the two — so you know before the last week whether you'll finish the vial or waste it.

  • Injection-site rotation that remembers yesterday so you don't have to.
  • Amber at 5 doses or 5 days left. Two vials open? One wears the "in use" badge; logging just works.
  • Full history with a filterable calendar and one-tap CSV export.
PepSync Today screen showing a completed factual log and an upcoming user-created Plan entry
Plans

Your schedule, as a shape.

Build simple daily plans or staged ones — step changes, on/off phases, multiple compounds — from your own entries. PepSync renders the shape, tells you what's next, and pre-fills every log so taking a scheduled dose is one tap.

  • "Up next" on the Today screen: compound, amount, time, and the rotation site — pulled from your plan.
  • Missed a day? It's grey, not red. Back-log it or mark it skipped; plans never shift or double up.
  • Vial-aware: PepSync warns when a plan needs more than your linked vial holds.
CJC evening ramp
wk 1● you are here · wk 2off wks 5–6
Next entrytoday 21:00 · 150 mcg · 7.5u
Adherence6 of 6 scheduled logged ✓
Linked vialCJC-1295 · 2 doses left
Privacy

Local-first isn't a feature. It's the architecture.

There is no PepSync server. No account, no sign-in, no analytics, no cloud copy of your log. Everything lives in a database on your iPhone, and the only way data leaves is you tapping Export.

  • Discreet notifications by default — your lock screen says "Reminder," never a compound name or amount.
  • Export everything anytime: one file, yours, readable. Import it on a new phone and continue.
  • No account to manage, no cloud sync to maintain, no hidden data pipeline.
PepSync
Reminder — open to see details
now
Account requiredNone
ServersZero
Analytics & trackingZero
Where your data livesYour iPhone
Pricing

Pay once. That's the whole model.

No subscription · yours forever
$19.99 once

One purchase. The whole app. Updates included.
No tiers, no locked features, no recurring subscription:

Answer-first calculator with Show Math
Unlimited vials with live counts & discard dates
Plans you author — stages, phases & timelines
Full history, filters & CSV export
Blend tools · staged Plans · backup & restore
Coming Soon
Coming to iPhone after App Store approval.
Launch price shown in USD; local pricing will appear in the App Store.
Questions

The honest FAQ

Does PepSync tell me what or how much to take?

No — by design. PepSync is a calculator and a notebook. Every dose, schedule, and plan is entered by you; the app does the unit math on your numbers, organizes your records, and reminds you of the schedule you wrote. It contains no dosing recommendations and is not medical advice.

Where does my data go?

Nowhere. There's no account and no server — your log lives in a local database on your iPhone. The only export paths are the ones you trigger yourself (backup file or CSV), and they save to wherever you point them.

Is it really just $19.99, once?

Yes. One purchase unlocks the entire app and is restorable on devices signed into your Apple ID. Updates are included, with no subscription, separate "pro" tier, or feature bundle held back for another recurring charge. You buy it once.

What happens if I get a new phone?

Export everything to a single backup file before you switch, then import it on the new phone — PepSync shows you a preview of exactly what's in the file and lets you merge or replace. Your purchase restores through your Apple ID.

Will my lock screen give me away?

No. Notifications are discreet by default — they say "PepSync — Reminder" and nothing else. If you want compound names and amounts on the lock screen, that's an explicit setting you turn on.

Draw with confidence.
Log in two seconds. Own your data.

$19.99, once. No subscription, no account, no cloud — just the app, yours.

Coming Soon