Comparison

Protokol vs Peptide Library

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

Head to head
About

Protokol

This educational tool helps adults learn about research peptides with a guided onboarding, a library of peptide information, and tools for calculating doses and conversions. It also features a private journal for logging activities and wellness check-ins, and an AI assistant for research-related questions.

Highlights
  • Guided onboarding for personalized research summaries
  • Library of 19 research peptides with summaries
  • Dose and reconstitution math calculators
  • Syringe unit conversions
  • Private local-first journal for logging
  • AI research assistant
Features
Read full description

Protokol keeps your peptide routine organized in one place — your schedule, your logs, and clear educational reference material, without spreadsheets or scattered notes. HOW IT WORKS Answer a few questions about your goals and experience level, and Protokol matches you with compounds the published research relates to your goals. You set your own schedule — which days, how often — and enter the amounts you're using. Protokol keeps the record and reminds you. WHAT'S INSIDE • Your Own Schedule — pick the compounds, days, and amounts yourself; Protokol never calculates or suggests them • Injection Logging — record what you took, when, and where, in a few taps • Compound Library — research-based reference information on peptides, mechanism, safety, and regulatory status, with published sources you can open and read • Scientific References — every compound and article links to the peer-reviewed studies, FDA notices, and clinical guidance behind it • Mixing & Storage Guides — step-by-step articles on reconstitution technique, syringe types, storage and travel, with listen-aloud audio • Daily Tracking — wellness check-ins and progress photos, private and secure • Ask Pepto, the AI research assistant — ask general questions about peptides, storage, and research anytime, always with a linked source IMPORTANT Protokol does not calculate, suggest, or display doses or schedules. Every amount and every schedule in the app is entered by you. The Compound Library shows mechanism, safety information, and published sources — never a dose range or regimen. Ask Pepto will not tell you what to take, how much, or how often; it cites its sources and points you to a licensed clinician. Nothing in Protokol is medical advice. FREE AND PREMIUM A free account lets you track and log one compound. Protokol Premium unlocks: • Ask Pepto, the AI research assistant • Tracking more than one compound at a time • The full compound library and every guide • Wellness check-ins and progress photos • Your full history calendar • Your complete research summary • Sharing your stack • Read-aloud audio for articles BUILT FOR BEGINNERS Protokol is designed for people who are new to peptide research and want a straightforward, organized way to keep track of what they're doing. Your data stays private and secure. A free account is required to use Protokol, so your schedule and progress stay saved and synced. SUBSCRIPTION Protokol Premium is an auto-renewing subscription: Monthly, or Annual with a 3-day free trial for eligible new subscribers. The price and billing period are shown in the app before you buy. Payment is charged to your Apple ID at confirmation. Subscriptions auto-renew unless canceled at least 24 hours before the current period ends. Manage or cancel anytime in your Apple ID settings. Terms of Use (EULA): https://protokolapp.com/terms Privacy Policy: https://protokolapp.com/privacy Protokol provides general research and organizational information only and does not offer medical advice. It is not a medical device and does not provide dosing guidance. Always consult a licensed healthcare provider.

About

Peptide Library

Features
Read full description

Peptide Library helps you track your peptide Cycle and research peptides and compounds in one place. Track your Cycle See what's scheduled today, record completed items, check your week, and use the calendar to look ahead or review what you've tracked. Build your Stack Add the compounds you're tracking, organize your schedule, set reminders, and keep your current Cycle in one place. Follow your progress Set goals, add measurements, and follow changes over time. Track weight and other measurable goals, along with check-ins for sleep, recovery, skin, and energy. Research peptides & compounds Explore an editorial library covering peptides and related compounds, with research context, safety information, administration information where supported, and source-backed references. Made for personal tracking Your Stack, amounts, schedules, goals, and measurements are entered by you. Peptide Library does not recommend compounds, combinations, dosages, or treatment protocols. Peptide Library is intended for educational and personal tracking purposes. It is not medical advice and is not a substitute for advice, diagnosis, or treatment from a qualified healthcare professional.

Screenshots

Protokol4 screens
Peptide Library4 screens

Verdict

The call

The clearest difference is in-app purchases: Peptide Library at none against Protokol's 6. Peptide Library also leads on ads (none vs shown). Protokol's advantage is iOS requirement (15.1 vs 18.0). On price, update cadence 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. Protokol sells 6 in-app purchases, starting at $4.99 per month. Peptide Library asks for nothing beyond the download.

UpkeepUpdate frequency

Protokol ships an update every 4 days, Peptide Library every 5 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Protokol versus Peptide Library: the parameters behind the verdict, then further details
ParameterProtokolPeptide Library
PriceFreeFree
Rating4.5 (17 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings17 — better—
Update frequencyEvery 4 days — betterEvery 5 days
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size51 MB16 MB
Age rating17+4+
DeveloperLukas LeChauJay Park

In-app purchases

6 purchases

Protokol

Subscriptions5
  • Protokol Premium$4.991 Month
  • Protokol Premium$9.991 Month
  • Protokol Premium3 Days trial$39.991 Year
Show 2 more
  • Protokol Premium3 Days trial$59.991 Year
  • protokol_annual3 Days trial$69.991 Year
One-time1
  • Protokol Lifetime$99.99
None

Peptide Library

No in-app purchases

Questions

Is Protokol free?
Protokol is free to download, with in-app purchases available.
Is Peptide Library free?
Peptide Library is free to download, with no in-app purchases.
Do Protokol or Peptide Library have ads?
Protokol shows ads; Peptide Library does not.
Which is updated more often, Protokol or Peptide Library?
Protokol ships an update every 4 days, and Peptide Library every 5 days. Most recently, Protokol was updated on November 5, 2026 and Peptide Library on October 31, 2026.

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