PepSync vs PeptideLab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PepSync
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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.
PeptideLab
Track peptide, GLP-1, and HRT protocols with detailed logging and bloodwork analysis. Import lab reports and DEXA scans to visualize changes. Features an AI-powered food log for comprehensive health monitoring. Prioritizes user privacy with local-first data storage.
- Extensive compound database
- Automated dose logging and titration
- Reconstitution and draw-volume calculations
- Lab report and DEXA scan import
- AI-powered food logging
- Local-first data privacy
- Customizable reports
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Serious tracking for peptides, GLP-1, TRT and HRT, with the bloodwork to see what actually changed. A precision instrument for people who run their own peptide, GLP-1, HRT and TRT protocols. Record an injection, a pill or a spray in a few taps, or let scheduled protocols run on auto-pilot. Log your workouts, water, meals and periods in the same place. Local-first and private. No efficacy claims, no gamification, no guilt. TRACK PROTOCOLS • The largest compound library in any tracker: peptides, GLP-1s, hormones and supplements • Record what you take in seconds, with titration schedules and cycle calendars • Injection-site rotation on a body map, with recently used sites marked before you pick one • Modeled Exposure: an estimate of what's on board now and where each blood draw fell on the curve • Adherence history and a verdict when a cycle ends TRACK YOUR PERIOD • Log periods, symptoms and waking temperature, with a calendar and a dial that shows where you are in your cycle • Perimenopause and menopause read from your own logs, including a hot flash count • Birth control reminders. Fertile days and ovulation are shown as estimates only, never as birth control • Your cycle data is never used for analytics LOG YOUR WORKOUTS • A library of 250+ exercises, each with a short demonstration of how it's done • Last time's numbers beside every set, a rest timer, and personal records marked as you hit them • Starter templates, a workout calendar, and progress charts for every exercise FOOD AND WATER • AI food log: type or photograph a meal, review the estimate, correct it, approve. Nothing logs without your review. • One-tap repeat meals, recipes, serving sizes, and targets you set yourself • Log water in a tap from the app, a widget or Siri, with reminders through the day KEEP INVENTORY • Vault: fridge, freezer and shelf zones, cap colors, and supply runway tied to your protocols • Photograph a kit's packing list to add vials in bulk UNDERSTAND YOUR BLOODWORK • Import lab PDFs or photos and confirm every value before it counts • Trends across every report and every lab, with printed originals always preserved • Ranges shown are the ones printed on YOUR report. Optional Pro overlay: literature ranges, cited on screen, labeled educational • Doctor-Ready PDF: protocols, adherence, history and labs in one document CONNECT YOUR BODY • Apple Health, Oura, WHOOP and Withings: sleep, HRV, resting heart rate and weight against your cycles • CGM glucose: time in range, and your glucose curve against your injections • A health score and biological age computed from your own labs TRACK YOUR HOUSEHOLD • Add a partner with their own protocols, logs, bloodwork and insights, kept separate, under one membership • One tap switches between people, a distinct color shows whose data you're viewing, and one shared Vault links vials to either person PRIVATE BY DESIGN • Local-first: your data lives on your device, with optional encrypted cloud backup you control • No ads, no data sales, no social feed WHAT PEPTIDELAB IS NOT PeptideLab is a personal record-keeping and education tool. It is not a medical device and does not provide medical advice, diagnosis, or treatment. It never recommends, suggests, or changes a compound, an amount, a schedule, or a protocol. Every protocol in the app is one you enter yourself. Always consult a licensed clinician before you start, change, or stop any protocol or supplement. PeptideLab Pro (subscription) unlocks unlimited protocols, Modeled Exposure, the Lab Assistant, bloodwork trends and the Doctor-Ready PDF, Apple Health, Oura, WHOOP and Withings, CGM glucose reports, health score and DEXA body composition, household profiles, Food Log photos, protocol reports, and full history beyond 30 days. Core tracking and CSV export are free, forever. Privacy Policy: https://peptidelabapp.com/privacy Terms of Use (EULA): https://peptidelabapp.com/terms
Screenshots
Verdict
The clearest difference is update cadence: PeptideLab at daily 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
Both are free to download. PepSync sells 1 one-off in-app purchase and PeptideLab sells 6 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
PepSync ships an update every 3 weeks, PeptideLab daily. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | PepSync | PeptideLab |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (27 ratings) — better |
| Positive reviews | — | 95.7% of reviews |
| Number of ratings | — | 27 — better |
| Update frequency | Every 3 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.4 | 16.4 |
| Further details — not scored | ||
| Size | 39 MB | 110 MB |
| Age rating | 17+ | 17+ |
| Developer | Rapid Sync IT LLC | Peptide Labs LLC |
In-app purchases
PepSync
- Unlock PepSync$19.99
PeptideLab
- Weekly$4.997 Days
- Monthly$9.991 Month
- Pro Annual (Invite)7 Days trial$55.991 Year
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- Pro Annual (Friend)7 Days trial$58.991 Year
- Annual (Founding)1 Year trial$59.991 Year
- Annual7 Days trial$69.991 Year









