Comparison

Peptify vs Peptide Library

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

Head to head
About

Peptify

Features
Read full description

Peptify is a free reference tool for peptide researchers. Reconstitute a vial, plan a multi-peptide protocol, or keep a record of what you've run โ€” the science stays at your fingertips. FEATURES Peptide Database 180+ research peptides with half-lives, storage temperatures, mechanisms of action, and sequence data. Includes BPC-157, tirzepatide, semaglutide, ipamorelin, and more. Reconstitution Calculator Work out concentration (mg/mL) and the syringe pull volume for any vial size and lyophilized mass. Stack Builder Plan multi-peptide protocols on weekly timelines. Start from a pre-built stack (Glow, KLOW, Wolverine) or build your own, then share it as a poster image. Dose Log Keep a record of what you've run with a calendar view, history, and streaks. Everything stays on your device. Inventory Manager Track vial counts, reconstitution dates, and expiry dates so supplies never slip past you. Reminders Set custom reminders with notifications. Clinical Trials Search Search active studies from ClinicalTrials.gov without leaving the app. Literature Search Read peptide research papers from Europe PMC. AI Search Ask a question in plain English and get answers drawn from the peptide database and documentation. Injection Site Reference A visual guide to injection sites and techniques. PRIVACY Peptify is built for people who care about privacy. Your data is stored locally on your device, and no account is required. Sign in and it syncs across your devices over an encrypted connection. No personal data is collected, sold, or shared. Ever. EDUCATIONAL USE ONLY Peptify is an educational reference tool for scientific research. It is not medical advice, and it is not intended to diagnose, treat, cure, or prevent any disease. Talk to a qualified professional about medical decisions. SUPPORT Questions, feedback, or a feature request? Visit https://www.peptify.info/support or email peptify.info@gmail.com LINKS Website: https://www.peptify.info Privacy Policy: https://www.peptify.info/privacy Terms of Use: https://www.peptify.info/terms

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

Peptify3 screens
Peptide Library4 screens

Verdict

The call

The clearest difference is device support: Peptify at 3 against Peptide Library's 1. Peptify also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Peptify ships an update every 8 days, Peptide Library every 5 days. The most recent releases landed on October 31, 2026 and October 14, 2026 respectively.

Scorecard2 real differences ยท 4 level
Peptify versus Peptide Library: the parameters behind the verdict, then further details
ParameterPeptifyPeptide Library
PriceFreeFree
Update frequencyEvery 8 daysEvery 5 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS15.0 โ€” better18.0
Further details โ€” not scored
Size45 MB16 MB
Age rating17+4+
DeveloperDANIEL VILLAREALJay Park

In-app purchases

None

Peptify

No in-app purchases

None

Peptide Library

No in-app purchases

Questions

Is Peptify free?
Peptify is free to download, with no in-app purchases.
Is Peptide Library free?
Peptide Library is free to download, with no in-app purchases.
Do Peptify or Peptide Library have ads?
Neither Peptify nor Peptide Library shows ads.
Which is updated more often, Peptify or Peptide Library?
Peptify ships an update every 8 days, and Peptide Library every 5 days. Most recently, Peptify was updated on October 31, 2026 and Peptide Library on October 14, 2026.

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