Peptide Library and Tracker vs PepStack Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Comprehensive Peptide Library & Database
- Advanced Peptide Dose Calculator
- Smart Tracking & Calendar View
- Lab Inventory Management
- Protocol Tracking & Lab Assistant
- Integrated Peptide Education
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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
PepStack Pro
This app provides a comprehensive database of peptides, personalized protocol recommendations, and tools to track your peptide journey. Monitor injections, log progress, and check for interactions to optimize your health and wellness goals safely.
- Peptide database with clinical data
- Personalized peptide recommendations
- Interaction checker for peptide safety
- Physician-designed protocol templates
- Injection schedule and dose tracking
- Lab and progress journaling
- Direct physician connection
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PepStack Pro is the most comprehensive peptide reference and protocol tracking app available. Whether you're exploring your first peptide or managing an advanced stack, PepStack Pro gives you the clinical data, dosing protocols, and tracking tools you need to optimize safely. PEPTIDE DATABASE Browse 40+ peptides with detailed clinical information including descriptions, mechanisms of action, and side effects. From BPC-157 to semaglutide, GHK-Cu to epithalon — it's all here. PERSONALIZED STACKS Take our guided quiz to find the right peptides for your goals — fat loss, muscle growth, longevity, sleep, cognitive enhancement, healing, and more. Get expert-curated recommendations tailored to your goals. INTERACTION CHECKER Check for potential conflicts between peptides before adding them to your stack. Know what's safe to combine, what needs caution, and what to avoid. PROTOCOL TEMPLATES Start with physician-designed protocol templates for common goals like fat loss, recovery, muscle building, and longevity. One tap to set up your entire protocol. PROTOCOL TRACKER Set up your injection schedule, track your daily doses, and never miss a pin. Full calendar view with cycle tracking, dose amounts, and scheduling by day of the week. INJECTION LOGGER Log every injection with site rotation tracking, mood ratings, and personal notes. Build a complete history of your peptide journey. LAB TRACKER Track bloodwork and lab results over time. Monitor 28+ biomarkers with color-coded reference ranges to ensure your protocols are working safely. PROGRESS JOURNAL Document your journey with notes, mood and energy ratings, and photos. See trends over time and share progress with your provider. DOSING PROTOCOLS (Premium) Unlock detailed dosing protocols, reconstitution guides, cycle lengths, optimal timing, and stacking recommendations for every peptide in the database. PHYSICIAN-GUIDED Connect directly with board-certified physicians specializing in peptide therapy and longevity medicine through our integrated MyFlowMD provider network. DISCLAIMER PepStack Pro is an educational reference tool. It does not provide medical advice, diagnoses, or treatment recommendations. Always consult a qualified healthcare provider before starting any peptide protocol. Terms of Use: https://www.pepstackpro.com/terms
Screenshots
Verdict
The clearest difference is monetization model: Peptide Library and Tracker at free against PepStack Pro's freemium. PepStack Pro's advantage is rating (5.0 vs 4.8). On price, review sentiment, ratings volume and update cadence 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. Peptide Library and Tracker sells 2 in-app purchases, starting at $4.99 per month and PepStack Pro sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.
PepStack Pro holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 21 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Peptide Library and Tracker ships an update every 10 days, PepStack Pro every 8 days. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.
| Parameter | Peptide Library and Tracker | PepStack Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (21 ratings) | 5.0 (11 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 21 — better | 11 |
| Update frequency | Every 10 days | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 77 MB | 39 MB |
| Age rating | 17+ | 17+ |
| Developer | Superfime LLC | MyFlowMD, LLC |
Customer experience
Peptide Library and Tracker
PepStack Pro
In-app purchases
Peptide Library and Tracker
- Peptide Library Pro Monthly7 Days trial$4.991 Month
- Peptide Library Pro Yearly7 Days trial$39.991 Year
PepStack Pro
- PepStack Pro Premium7 Days trial$8.991 Month
- PepStack Pro Premium7 Days trial$49.991 Year
Questions
Is Peptide Library and Tracker free?
Is PepStack Pro free?
Which has better reviews, Peptide Library and Tracker or PepStack Pro?
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Which is updated more often, Peptide Library and Tracker or PepStack Pro?
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