Comparison

Peptide Library and Tracker vs PepGuide

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

Head to head
About

Peptide Library and Tracker

This app serves as a comprehensive guide and lab assistant for peptide research. It offers a detailed peptide library, dose calculation tools, and advanced tracking features for logging, inventory management, and protocol adherence. Users can also access educational content and community Q&A to enhance their research workflow.

Highlights
  • Comprehensive Peptide Library & Database
  • Advanced Peptide Dose Calculator
  • Smart Tracking & Calendar View
  • Lab Inventory Management
  • Protocol Tracking & Lab Assistant
  • Integrated Peptide Education
Features
Read full description

Peptide Tracker and Library The all-in-one peptide calculator, peptide tracker, and research library for protocols, inventory, and precise dosing. Calculate, log, and stay consistent — in one research tool. PEPTIDE CALCULATOR Convert mg, mcg, and IU. Calculate reconstitution, vial concentration, injection volume, and multi-peptide stacks. Save recent calculations for the next session. PEPTIDE TRACKER Log every dose with time and notes. Set schedules and reminders. Use the calendar to review cycles, streaks, and missed doses. Track symptoms and journal entries alongside each protocol. INVENTORY See how much is left in each vial, capsule, or spray. Get low-stock and reorder alerts. Inventory updates when you log a dose. RESEARCH LIBRARY Browse a peptide database with protocols, mechanisms, reconstitution notes, PubMed references, and molecular data. Open Peptide School courses, guides, and FAQs when you want structured learning. VENDOR PRICES Search supported vendors, compare price per mg, check stock, and unlock available discounts — without leaving the app. PROGRESS Log weight, body composition, and progress photos. Charts show how your research notes change over time. BUILT FOR RESEARCH WORKFLOWS Fast search. Offline use. Optional account sync. Local-first storage. For research and educational purposes only. Not medical advice. Not for human consumption. Consult a qualified professional before any protocol. Subscription Information Pro Monthly — $5.99/month Pro Yearly — $49.99/year Subscription auto-renews unless turned off 24 hours before the end of the current period. Manage subscriptions in your App Store account settings. Privacy Policy: https://peptidelibrary.app/privacy EULA: https://peptidelibrary.app/terms

About

PepGuide

This app helps you build effective supplement stacks tailored to your health goals. It provides evidence-based insights into supplement interactions, compatibility, and community-driven trends. Optimize your wellness journey with clear, research-backed guidance.

Highlights
  • Goal-based supplement recommendations
  • Supplement interaction analysis
  • Stack compatibility insights
  • Community stack comparisons
  • Evidence-informed supplement profiles
  • Customizable supplement stacking
Features
Read full description

Build smarter supplement stacks based on your goals, not guesses. PepGuide helps you understand which supplements align with your goals, which ones conflict, and how each compound interacts when used together. Whether you're focused on muscle growth, fat loss, recovery, mood, longevity, or general wellness, the app gives you clear, evidence-informed insights tailored to what you want to achieve. Start With Your Goal Choose your goal and instantly see: Supplements that support your goal Supplements that may work against it Neutral supplements that can fit depending on your stack Research-backed context for why they help or hinder PepGuide simplifies complex supplement science so you can make confident decisions. Test & Compare Stacks Easily build custom supplement stacks and see: How well your stack aligns with your selected goal Where your ingredients may overlap, conflict, or cancel out Synergies and potential issues based on known mechanisms Strengths and weaknesses vs. other user-generated stacks Experiment, optimize, and refine—all inside the app. Compatibility Insights PepGuide shows you: Which supplements play well together Which combinations may reduce effectiveness Where timing or dose adjustments matter And which stacks are commonly used for your goal It’s like having a research assistant that highlights the best ways to combine supplements safely and effectively. Learn From the Community See how your stack compares to: Top-rated stacks for your goal Popular combinations across the app What others are experimenting with Get inspiration and learn from real patterns. Clear, Expert-Styled Explanations Every supplement profile includes: What it does: Mechanisms & expected effects Pros, cons, and safety notes When and how people typically use it What goals it tends to support What goals it may work against Zero fluff. Just clarity. Disclaimer PepGuide provides educational information only and does not offer medical advice. Always consult a healthcare professional before using supplements. Subscription Required for Premium Features PepGuide includes optional auto-renewing subscriptions that unlock premium features. A subscription is required to access advanced supplement grading, including detailed grades for individual supplements, comprehensive grading of entire supplement stacks, and comparisons of your supplement stack with those used by other individuals. You can explore general educational content in the app without a subscription, but premium analysis and comparison features are available only with an active subscription. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Peptide Library and Tracker4 screens
PepGuide4 screens

Verdict

The call

The clearest difference is review sentiment: Peptide Library and Tracker at 86% against PepGuide's 33%. Peptide Library and Tracker also leads on rating (4.7 vs 3.9) and monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence and ads 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. Peptide Library and Tracker sells 2 in-app purchases, starting at $4.99 per month and PepGuide sells 5 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Peptide Library and Tracker holds the better App Store score, 4.7 against 3.9. Both are backed by a comparable volume of ratings — 25 and 14 respectively. Written reviews point the same way: 86% of Peptide Library and Tracker's written reviews are positive against 33% of PepGuide's.

UpkeepUpdate frequency

Peptide Library and Tracker ships an update every 10 days, PepGuide every 3 weeks. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

Scorecard4 real differences · 6 level
Peptide Library and Tracker versus PepGuide: the parameters behind the verdict, then further details
ParameterPeptide Library and TrackerPepGuide
PriceFreeFree
Rating4.7 (25 ratings) — better3.9 (14 ratings)
Positive reviews85.7% of reviews — better33.3% of reviews
Number of ratings25 — better14
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better26.0
Further details — not scored
Size78 MB28 MB
Age rating17+4+
DeveloperSuperfime LLCGOAT STEW LLC

Customer experience

Peptide Library and Tracker

All ratings25 ratings
Positive92.0%
Neutral4.0%
Negative4.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

PepGuide

All ratings14 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

2 purchases

Peptide Library and Tracker

Subscriptions2
  • Peptide Library Pro Monthly7 Days trial$4.991 Month
  • Peptide Library Pro Yearly7 Days trial$39.991 Year
5 purchases

PepGuide

Subscriptions5
  • Weekly Access3 Days trial$4.997 Days
  • Monthly Access$14.991 Month
  • Unlock PepGuide Premium3 Days trial$14.991 Month
Show 2 more
  • Yearly Offer — 80% Off$19.991 Year
  • Yearly Access3 Days trial$99.991 Year

Questions

Is Peptide Library and Tracker free?
Peptide Library and Tracker is free to download, with in-app purchases available.
Is PepGuide free?
PepGuide is free to download, with in-app purchases available.
Which has better reviews, Peptide Library and Tracker or PepGuide?
Peptide Library and Tracker is rated higher. Peptide Library and Tracker averages 4.7 out of 5 from 25 ratings, while PepGuide averages 3.9 from 14 ratings.
Do Peptide Library and Tracker or PepGuide have ads?
Neither Peptide Library and Tracker nor PepGuide shows ads.
Which is updated more often, Peptide Library and Tracker or PepGuide?
Peptide Library and Tracker ships an update every 10 days, and PepGuide every 3 weeks. Most recently, Peptide Library and Tracker was updated on October 16, 2026 and PepGuide on October 6, 2026.

Other comparisons