Comparison

PepSync vs Peptide Vault

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PepSync

Read full description

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.

About

Peptide Vault

Log peptide doses, track injection sites, and manage custom regimens. Access a reference library of over 50 peptides and a reconstitution calculator. All data is stored privately on your device.

Highlights
  • Dose logging
  • Injection site rotation
  • Custom regimen building
  • Compound overlap reporting
  • Peptide reference library
  • Reconstitution calculator
  • On-device data storage
Features
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Peptide Vault is the tracking and research companion for people who take their protocol seriously. TRACK Track an FDA-approved GLP-1 (semaglutide, tirzepatide, and other approved GLP-1s): dose schedule, next-dose countdown, streaks, adherence, dose history, and reminders. Build the schedule you actually follow: every few days, chosen weekdays like Mon–Fri, or on/off cycles. BUILT AROUND YOUR SCHEDULE Pick your first dose day and your schedule patterns from it — weekly, twice weekly, three times weekly, every other day, or every two weeks. Log a dose in seconds. Your history lives on a calendar you can actually read. PEPTIDE VAULT PRO • My cabinet — save vial photos, ingredient amounts, mix dates and notes, with cabinet backup and restore. • Custom blend protocols — one schedule and one log for a multi-ingredient vial, with a recorded ingredient breakdown. • Coach — a research assistant grounded in your own protocol. Ask about the published research behind the compounds you track. Coach's answers are grounded in published research, and it never gives dosing or medical advice. • Track unlimited compounds across your whole protocol. • Open all 203 compounds in the research library — every entry referenced, with regulatory status, mechanisms, risks and side effects stated plainly. • Site rotation, suggested at every dose. • Dose history and trends across everything you run. • Journal with full record export, any time. COMMUNITY Join public conversations about app tips and staying organized. Posts and replies are moderated, with likes, sharing, reporting and blocking. Your optional Community profile and posts are stored on our servers; approved posts are public. Private tracking records are not posted automatically. Activity notifications are optional. YOUR DATA No account is required for private tracking. Your protocol, logs, and journal live on your device. Coach shares only what you approve — your compound names and stack summary, never your journal, notes, or Apple Health data. Peptide Vault is a tracking and reference tool. It does not provide medical advice, diagnosis, or treatment. Always consult a medical professional before using peptides. Peptide Vault Pro is an auto-renewing subscription: $39.99 per year or $9.99 per month (prices may vary by region). Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is canceled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage or cancel your subscription in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://100apps.app/privacy/peptide-vault

Screenshots

PepSync4 screens
Peptide Vault4 screens

Verdict

The call

The clearest difference is update cadence: Peptide Vault at weekly against PepSync's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PepSync sells 1 one-off in-app purchase and Peptide Vault sells 15 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PepSync ships an update every 3 weeks, Peptide Vault weekly. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
PepSync versus Peptide Vault: the parameters behind the verdict, then further details
ParameterPepSyncPeptide Vault
PriceFreeFree
Rating—5.0 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Subscription
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.4 — better17.0
Further details — not scored
Size39 MB56 MB
Age rating17+17+
DeveloperRapid Sync IT LLCJacob Teague

In-app purchases

1 purchases

PepSync

One-time1
  • Unlock PepSync$19.99
15 purchases

Peptide Vault

Subscriptions15
  • Peptide Vault Pro Weekly$4.997 Days
  • Peptide Vault Pro Monthly$9.991 Month
  • Peptide Vault Pro Monthly$12.991 Month
Show 12 more
  • Peptide Vault Pro Monthly$14.991 Month
  • Pro Annual$29.991 Year
  • Pro Annual — 7 Days Free7 Days trial$29.991 Year
  • Pro Annual — 14 Days Free14 Days trial$29.991 Year
  • Pro Annual3 Days trial$39.991 Year
  • Pro Annual$39.991 Year
  • Pro Annual — 7 Days Free7 Days trial$39.991 Year
  • Pro Annual — 14 Days Free14 Days trial$39.991 Year
  • Pro Annual — 14 Days Free14 Days trial$49.991 Year
  • Pro Annual$49.991 Year
  • Pro Annual — 7 Days Free7 Days trial$49.991 Year
  • Peptide Vault Pro7 Days trial$69.991 Year

Questions

Is PepSync free?
PepSync is free to download, with in-app purchases available.
Is Peptide Vault free?
Peptide Vault is free to download, with in-app purchases available.
Do PepSync or Peptide Vault have ads?
Neither PepSync nor Peptide Vault shows ads.
Which is updated more often, PepSync or Peptide Vault?
PepSync ships an update every 3 weeks, and Peptide Vault weekly. Most recently, PepSync was updated on October 17, 2026 and Peptide Vault on October 24, 2026.

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