Peptide Library

App comparison • 2026

Peptide Library vs Peptide Tracker & Calculator: Privacy, Vials and Research

How a private, iPhone-only vial tracker compares with a research platform on Android, iPhone and the web.

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Last verified · Published by Peptide Library, which has a commercial interest in this comparison. How we compare

Peptide Library app icon

Peptide Library

By Superfime LLC

A peptide research platform: cited research profiles, vendor and price comparison, tracking and inventory on iPhone, Android and the web.

Peptide Tracker & Calculator app icon

Peptide Tracker & Calculator

iPhone app by David Dzeveckij (glp1.app)

A private, on-device iPhone tracker with detailed vial records, injection-site rotation, bloodwork logging and widgets.

Quick verdict

Peptide Library or Peptide Tracker & Calculator?

Peptide Tracker & Calculator, an iPhone app by David Dzeveckij sold through glp1.app, is for people who want detailed vial records and nothing leaving the phone: its App Store privacy label reads Data Not Collected and it needs no account. Peptide Library covers similar tracking and inventory, adds cited research and vendor comparison, and runs on Android and in a browser as well.

Peptide Library app icon

Peptide Library

Choose Peptide Library if…

  • You use Android or want a web app; Peptide Tracker & Calculator lists only an iPhone app.
  • You want cited research profiles and publication and trial data.
  • You check vendor listings and price per mg before you reorder.
  • You want a community and anonymous research trends.
Peptide Tracker & Calculator app icon

Peptide Tracker & Calculator

Choose Peptide Tracker & Calculator if…

  • You want no account and no data collection at all.
  • You want very detailed vial records: diluent, storage conditions, source and batch number.
  • You log bloodwork, or want heart rate, HRV, glucose and blood pressure from Apple Health next to your doses.
  • You want a low subscription price: Full App Access is listed from $3.99 a month or $19.99 a year.

At a glance

Feature comparison: Peptide Library vs Peptide Tracker & Calculator

Every cell comes from a cited source; numbers link to the source list at the end of the page. "Not advertised" means no source we checked mentions the feature, not that the app lacks it.

  • Verified
  • Verified, with limits
  • Verified absent or removed
  • Not advertised by the developer
  • Not verified (sources disagree or unclear)
Research4 features
Research: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Compound library
200+ profiles7
100+ compounds and blends14
Cited research references
Yes7

PubMed, ClinicalTrials.gov, DailyMed and EMA references on profiles.

Yes14

Library entries include research references.

Publication and trial data
Yes8

Research Intelligence Center: publication and trial statistics.

Not advertised
Community research trends
Yes (full view with Pro)91
Not advertised
Vendor discovery4 features
Vendor discovery: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Vendor directory
Yes10
Not advertised
Vendor price comparison
Yes11
Not advertised
Price per mg
Yes111
Not advertised

Purchase price can be stored per vial.

Vendor reviews
Yes10
Not advertised
Availability4 features
Availability: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
iPhone app
Yes3
Yes15
Android app
Yes4
Not advertised

The site lists the iPhone app only. A Play app with the same name is from a different developer.

Web app
Yes, installable5

Library, calculators and vendor prices need no account; tracking needs a free account.

Not advertised

The site has free web calculators, but tracking is in the iPhone app.

Free plan
Yes (inventory: 1 peptide)1
Free to start14
Inventory4 features
Inventory: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Vial inventory
Yes (free: 1 peptide)1
Yes1514

Concentration, diluent, storage, source, batch and expiry per vial.

Low-stock or run-out alerts
Yes4

Run-out and reorder dates with stock alerts.

Yes1514
Expiry dates
Yes4
Yes1514
Stock deducted on logging
Yes4
Yes14

Restores stock when a dose is deleted.

Tracking2 features
Tracking: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Dose logging
Yes14
Yes15
History and calendar
Yes4
Yes15

Full history filterable by compound.

Scheduling3 features
Scheduling: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Recurring schedules
Yes1
Yes14
Reminders
Yes16

App notifications; web push reminders on the website.

Yes14
Cycles and titration
Yes4

On/off cycles, every-N-days, several times a day and titration.

Cycle planner in the calculator15

Schedules run daily, weekly or at intervals with start and end dates.

Calculations2 features
Calculations: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Reconstitution calculator
Android and web124
Yes1514

In the app name and on the site; free web calculators too.

Estimated level charts
No1

Profiles list half-lives; there is no modelled level chart.

Not advertised
Metrics and progress4 features
Metrics and progress: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Weight and body metrics
Yes1
Yes14
Progress photos
Yes (free: up to 2)1
Not advertised
Journal or symptom check-ins
Yes1

Journal check-ins with mood, energy, sleep and symptoms.

Notes per dose15
Injection-site rotation
In the apps, not on the web4
Yes15

Rest periods and next-site suggestions.

Nutrition and wellness1 feature
Nutrition and wellness: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Nutrition tracking
No1
Not advertised
Community1 feature
Community: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Community
Discussions free; Q&A with Pro131
Not advertised
Integrations4 features
Integrations: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Apple Health
Yes6

Reads weight and body fat; never writes.

Yes14

Imports weight, heart rate, HRV, glucose, blood pressure and more; bloodwork logging.

Health Connect (Android)
Yes6

Reads weight and body fat; never writes.

Not advertised
Wearables
No1

No Oura, WHOOP or Apple Watch app.

Not advertised
Home Screen widgets
iPhone only4

Home Screen and Lock Screen widgets ship in the iPhone app; Android has none yet.

Yes1514

Home Screen and Lock Screen.

AI1 feature
AI: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
AI assistant
No1

No AI in the app. A public, read-only MCP server lets AI assistants look up library profiles.

Not advertised
Data, sync and privacy3 features
Data, sync and privacy: Peptide Library compared with Peptide Tracker & Calculator
FeaturePeptide LibraryPeptide Tracker & Calculator
Multi-device sync
Pro (free Android accounts sync most data)1
Optional iCloud sync14
On-device storage
Yes46

The apps keep data on the device; account sync is optional.

Yes1514

App privacy label: Data Not Collected. No account needed.

Data export
Pro1
Yes14

PDF, CSV or TXT reports.

Want research, vendor prices and tracking in one place? Peptide Library has a free plan.

Try Peptide Library freeExplore the research library

The difference

What makes Peptide Library different?

  • Two privacy models

    Peptide Tracker & Calculator stores everything on the iPhone, with optional iCloud backup, and its developer reports collecting no data. Peptide Library's apps also keep data on the device, with account sync when you choose it; the web app is account-based.

  • Platforms

    Peptide Tracker & Calculator is an iPhone app; its website offers free web calculators but no web tracker. Peptide Library has iPhone and Android apps and a web app you can install.

  • Research and vendors

    glp1.app describes a library of 100+ compounds and blends with half-lives and references. Peptide Library adds publication and trial statistics, side-by-side peptide comparison and vendor price comparison.

  • Inventory detail

    Both deduct stock when you log and give it back when a log is deleted. Peptide Tracker & Calculator records batch, diluent and storage; Peptide Library records price, purchase, opened and beyond-use dates, vendor and COA, and forecasts reorder-by dates.

These pieces work together: read a profile, compare vendors on price per mg, add what you bought to inventory, and every logged dose updates your stock, calendar and journal.

Research

Research library: a reference platform or a tracking companion?

The glp1.app website describes a compound library of 100+ compounds and blends with half-life data, descriptions and research references, plus presets for branded medications. That is a solid reference for a tracker.

Peptide Library's 200+ profiles go further into the evidence: each cites its sources, labels studies by evidence type and states regulatory status, and the Research Intelligence Center publishes publication and clinical-trial statistics per peptide with its methodology.

Browse the 200+ research profiles · See the Research Intelligence Center

Tracking

Tracking, scheduling and inventory workflows

Both apps log the amount, time, site and notes and let you filter history by compound. Peptide Tracker & Calculator adds injection-site rest periods with colour-coded status and suggests your next site; Peptide Library's apps also suggest a next site from your rotation on a body map.

For stock, Peptide Tracker & Calculator records concentration, diluent, storage, source, batch and expiry per vial and raises low-stock and expiry alerts. Peptide Library tracks vials, capsules, nasal sprays and ready-to-use containers, estimates doses left and run-out, and adds reorder-by dates and reorders.

Its widgets can log a dose from the Home or Lock Screen without opening the app. Peptide Library's iPhone widgets open a confirm sheet in the app before anything is logged.

Vendors

Vendor and pricing research

Peptide Tracker & Calculator lets you note a vial's source and price, but doesn't advertise vendor listings or comparison. Peptide Library's Shop compares vendor listings by compound and product form, shows price per mg after any coupon code, and links to vendor profiles with reviews.

  • Compare listings

    Offers grouped by compound and product form, never mixed across forms.

  • Price per mg

    Unit prices after any vendor coupon code, from what the listing shows.

  • Vendor profiles

    Reviews, coupons and the shipping details a source supports.

About vendor listings. Vendor listings, prices, reviews, coupon codes and commercial partnerships are not independent proof of a product's purity, safety, legitimacy or suitability for human use, and a listing is not an endorsement. Peptide Library does not sell peptides. Some vendor links are affiliate links; affiliate status never changes the order vendors appear in.

Compare vendor prices · Browse the vendor directory

Screens

Inside Peptide Library

Screens from Peptide Library on the web and in the app. We don't show Peptide Tracker & Calculator's screens; see its store listing for those.

  • Peptide Library body metrics on iPhone: weight, body fat, fat mass and lean mass with 90-day trends
    Body metrics with trends, next to your logs.
  • The Peptide Library calendar on iPhone with every scheduled entry this month logged
    A calendar of what was logged and what is next.
  • Peptide Library inventory on iPhone with low-stock and reorder alerts and run-out dates
    Inventory with uses left, run-out dates and reorder alerts.
  • Peptide Library tracker on iPhone with today’s scheduled entries and a 31-day streak
    Schedules, reminders and a daily log with streaks.

Pricing

Pricing: Peptide Library vs Peptide Tracker & Calculator

Full App Access is listed on the App Store at $3.99 or $4.99 a month and $19.99 or $24.99 a year, with a 3-day trial on the annual plan. Peptide Library Pro is $4.99 a month, $39.99 a year or $89.99 once; its free plan includes the library, vendor prices, logging and schedules, with inventory limited to one peptide.

Pricing in US dollars, checked October 25, 2026
PlanPeptide LibraryPeptide Tracker & Calculator
Free accessFree1

Library, vendor prices, logging, schedules, journal and metrics are free. Inventory is limited to 1 peptide.

Free to start14

The site says "free to start" with no account; it does not list what the free tier includes.

Monthly$4.9921$3.99–$4.9915
Annual$39.9921$19.99–$24.9915
Lifetime$89.9921Not listed
Free trialNot stated3-day free trial on the annual plan
ModelFree plan; Pro subscription or lifetime purchaseFree download; Full App Access subscription
  • US prices, checked October 25, 2026. Store prices vary by country and change; the price shown in each app before purchase is the one that applies. Check official pricing before you subscribe.
  • Peptide Library: US prices. App Store and Google Play prices are set per country and shown in the app before purchase.

Fair is fair

Where Peptide Tracker & Calculator wins

  • No account, no data collected

    Its privacy label says Data Not Collected, and the site says there are no sign-ups, servers or telemetry.

  • Bloodwork and broad health data

    Log lab results against ranges, scan lab reports, and import heart rate, HRV, glucose and blood pressure from Apple Health. Peptide Library reads weight and body fat only.

  • Widgets that log directly

    Home and Lock Screen widgets show the next dose and can log it without opening the app.

  • Detailed exports

    Filtered PDF, CSV or TXT reports with optional graphs and summary statistics.

Who it suits

Who should use which app?

  • You use only an iPhone and want maximum privacy

    Peptide Tracker & Calculator

    No account needed, Data Not Collected on its privacy label, and optional iCloud backup.

  • You use Android, or switch to a laptop

    Peptide Library

    Android and web apps on the same account.

  • You track bloodwork alongside your protocol

    Peptide Tracker & Calculator

    Lab results, report scanning and CSV import are built in.

  • You compare vendors before you reorder

    Peptide Library

    Vendor listings and price per mg next to your inventory.

  • You want the research and your records together

    Peptide Library

    Cited profiles and research statistics in the same app.

Final verdict

The verdict on Peptide Library vs Peptide Tracker & Calculator

Peptide Tracker & Calculator is a thoughtful choice for iPhone users who put privacy and vial detail first. Peptide Library is the better fit if you need Android or the web, or if research and vendor comparison are part of how you decide.

Neither app needs an account to start. You can try Peptide Library's library and vendor prices in a browser before installing anything.

Get the Peptide Library app, or start on the web without an account.

Try Peptide Library freeBrowse vendor prices

FAQ

Peptide Tracker & Calculator vs Peptide Library: common questions

Is Peptide Tracker & Calculator the same app as Peptide Library?

No. It's an independent iPhone app by David Dzeveckij, promoted through glp1.app. Peptide Library is made by Superfime LLC, and its store listings are named Peptide Library and Tracker.

Is Peptide Tracker & Calculator available on Android?

Its website lists only the iPhone app. A Google Play app with a similar name comes from a different developer. Peptide Library is on iPhone, Android and the web.

Does Peptide Tracker & Calculator collect my data?

Its App Store privacy label says Data Not Collected (as reported by the developer), and its site says there are no sign-ups or servers; iCloud backup is optional. Peptide Library's apps also work offline with data on the device, and account sync is optional.

Which app has more detailed vial tracking?

Peptide Tracker & Calculator records batch number, diluent and storage per vial. Peptide Library records price, dates, vendor and COA per container and forecasts run-out and reorder-by dates. Both deduct stock when you log.

Where is the Peptide Library calculator?

On Android and on the website at peptidelibrary.app/calculator, which needs no account. It converts mg, mcg and IU and works out concentration after mixing.

How much does Peptide Tracker & Calculator cost?

The App Store lists Full App Access at $3.99 or $4.99 a month and $19.99 or $24.99 a year, with a 3-day trial on the annual plan (US, checked October 2026).

Explore More Than Peptide Tracking

Research peptides, organize your tracking, manage inventory, and compare vendors in one place.

Get Peptide Library for iOSGet Peptide Library for AndroidExplore Peptide Library on the Web

Free plan available. Pro adds unlimited inventory, sync on every device, export and more; see Free vs Pro.

Peptide Library app icon

Peptide Library

By Superfime LLC

Peptide Tracker & Calculator app icon

Peptide Tracker & Calculator

iPhone app by David Dzeveckij (glp1.app)

Peptide Tracker & Calculator is developed by David Dzeveckij (glp1.app).

Sources

Store listings and developer websites as read on the date shown. Competitor details can change after that date.

  1. 1.Peptide Library Free vs Pro (Peptide Library, read )
  2. 2.Peptide Library pricing (Peptide Library, read )
  3. 3.Peptide Library and Tracker on the App Store (Apple App Store, read )
  4. 4.Peptide Library and Tracker on Google Play (Google Play, read )
  5. 5.Install the Peptide Library web app (Peptide Library, read )
  6. 6.Peptide Library privacy policy (Peptide Library, read )
  7. 7.Peptide Library research profiles (Peptide Library, read )
  8. 8.Research Intelligence Center (Peptide Library, read )
  9. 9.Peptide Trends (Peptide Library, read )
  10. 10.Peptide vendor directory (Peptide Library, read )
  11. 11.Compare peptide prices and vendors (Peptide Library, read )
  12. 12.Peptide calculator (Peptide Library, read )
  13. 13.Peptide Library community discussions (Peptide Library, read )
  14. 14.glp1.app (David Dzeveckij, read )
  15. 15.Peptide Tracker & Calculator on the App Store (Apple App Store, read )

Disclosure and method

Peptide Library publishes this comparison and has a commercial interest in helping you evaluate its platform. Competitor features and pricing are reviewed using publicly available information: App Store and Google Play listings and each developer's own website, read on . We identify situations where another app may be a better fit.

We did not install or test competitor apps for these pages, and we don't score or rank them. A feature no source mentions is shown as "Not advertised", never as missing. App names and icons are trademarks of their respective owners, used only to identify the apps; Peptide Library is not affiliated with or endorsed by them.

Spotted something out of date? Tell us and we'll check it against the developer's sources. Corrections follow our editorial policy.

Research and educational use only. Not medical advice. Peptide Library does not sell peptides.