Peptide Library

App comparison • 2026

Peptide Library vs PeptidePal: Which Peptide Tracker Fits You Better?

Protocols, vials, research, vendor pricing and privacy compared side by side, with what each app does best.

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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.

PeptidePal app icon

PeptidePal

By Blank Labs (peptidepal.health)

A peptide and GLP-1 protocol tracker with vial inventory, reconstitution math, injection-site rotation, a compound library, an AI advisor and a peer forum.

Quick verdict

Peptide Library or PeptidePal?

PeptidePal is a polished protocol tracker: several protocols side by side, vial run-out warnings, reconstitution math, a body map, an AI advisor and a moderated forum, with protocol data kept on your device by default. Peptide Library tracks too, but adds cited research, publication data and vendor price comparison, and it runs in a browser as well as on iPhone and Android.

Peptide Library app icon

Peptide Library

Choose Peptide Library if…

  • You want research profiles with cited sources, not only plain-English summaries.
  • You compare vendor listings and price per mg before buying.
  • You want a web app alongside the phone apps.
  • You'd rather pay once: Peptide Library offers a lifetime option, while PeptidePal's listing shows only subscriptions.
PeptidePal app icon

PeptidePal

Choose PeptidePal if…

  • You run several protocols side by side and want each to stay exactly as you designed it.
  • You want protocol data on your phone by default, with iCloud sync only if you turn it on.
  • You want an AI advisor and a peer forum inside the app.
  • You want reconstitution math with a syringe diagram in its iPhone app.

At a glance

Feature comparison: Peptide Library vs PeptidePal

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 PeptidePal
FeaturePeptide LibraryPeptidePal
Compound library
200+ profiles7
Yes (listing says 110+ and 50+)14

The same description gives two different counts.

Cited research references
Yes7

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

Not advertised

Profiles list mechanism, half-life, research and regulatory status; citations are not mentioned.

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 PeptidePal
FeaturePeptide LibraryPeptidePal
Vendor directory
Yes10
Not advertised
Vendor price comparison
Yes11
Not advertised
Price per mg
Yes111
Not advertised
Vendor reviews
Yes10
Not advertised
Availability4 features, 1 not verified
Availability: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
iPhone app
Yes3
Yes14
Android app
Yes4
Yes1516
Web app
Yes, installable5

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

Not advertised
Free plan
Yes (inventory: 1 peptide)1
Free download14

Free to download; the free tier is not described.

Inventory4 features
Inventory: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Vial inventory
Yes (free: 1 peptide)1
Yes14
Low-stock or run-out alerts
Yes4

Run-out and reorder dates with stock alerts.

Yes14

Projects run-out from the schedule and warns about a week ahead.

Expiry dates
Yes4
Yes14
Stock deducted on logging
Yes4
Not advertised
Tracking2 features
Tracking: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Dose logging
Yes14
Yes14
History and calendar
Yes4
Yes14

Week strip and monthly calendar.

Scheduling3 features
Scheduling: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
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.

Yes14

Cycles and on/off weeks such as 5-on/2-off.

Calculations2 features
Calculations: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Reconstitution calculator
Android and web124
Yes14

mg/mL math on a syringe diagram; it does not recommend amounts.

Estimated level charts
No1

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

Yes14
Metrics and progress4 features
Metrics and progress: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Weight and body metrics
Yes1
Yes14

Weight and body-composition charts.

Progress photos
Yes (free: up to 2)1
Yes14

Compare and time-lapse.

Journal or symptom check-ins
Yes1

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

Not advertised

Protocols have a notes field.

Injection-site rotation
In the apps, not on the web4
Yes14

Body map with recently used sites heat-mapped.

Nutrition and wellness1 feature
Nutrition and wellness: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Nutrition tracking
No1
Not advertised
Community1 feature
Community: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Community
Discussions free; Q&A with Pro131
Yes14

Moderated peer forum.

Integrations4 features
Integrations: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Apple Health
Yes6

Reads weight and body fat; never writes.

Not advertised
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.

Not advertised
AI1 feature
AI: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
AI assistant
No1

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

Yes1416

AI advisor for educational questions; needs a connection.

Data, sync and privacy3 features
Data, sync and privacy: Peptide Library compared with PeptidePal
FeaturePeptide LibraryPeptidePal
Multi-device sync
Pro (free Android accounts sync most data)1
Optional iCloud sync16
On-device storage
Yes46

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

Yes1416
Data export
Pro1
Not advertised

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?

  • Cited research instead of summaries alone

    PeptidePal's profiles explain mechanism, half-life, research and regulatory status in plain English. Peptide Library's profiles cite their sources, label evidence by type and connect to publication and trial statistics.

  • Vendor discovery

    PeptidePal's listing and website don't mention vendors or prices. Peptide Library compares vendor listings and price per mg within each product form, with coupon codes and vendor reviews.

  • Where your data lives

    PeptidePal keeps protocol data on the device by default, with optional iCloud sync. Peptide Library's apps also store data on the device; sync between devices uses your account, and the web app is account-based.

  • Forecasting stock

    Both project when a vial runs out: PeptidePal warns about a week ahead. Peptide Library deducts stock as you log, gives run-out and reorder-by dates, and covers capsules, nasal sprays and ready-to-use containers as well as vials.

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?

PeptidePal's compound library is written in plain English. Each entry states its regulatory status, mechanism, half-life and reported side effects, and the app adds curated stacks. Its App Store description gives both 110+ and 50+ as the number of profiles, so we haven't used either figure.

Peptide Library's 200+ profiles are built as research references: each cites its sources (PubMed, ClinicalTrials.gov, DailyMed or EMA), labels studies by evidence type and links to the Research Intelligence Center's publication and trial statistics. You can compare two or three peptides side by side and see which ones the community is researching.

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

Tracking

Tracking, scheduling and inventory workflows

PeptidePal's protocol builder works in mcg, mg, IU and mL, with daily, every-other-day, twice-weekly and 5-on/2-off patterns, and logging is one tap from a week strip. Peptide Library's schedules cover the same patterns plus several times a day and titration, and its reminders are planned dose by dose.

For inventory, PeptidePal records fill size, concentration and expiry and projects run-out from your live schedule. Peptide Library deducts stock when you log, estimates doses left, run-out and reorder-by dates, and keeps price, dates, vendor and COA for each container.

PeptidePal also charts an estimated on-board level from your logs and offers progress-photo time-lapses; Peptide Library compares progress photos side by side but does not model levels.

Vendors

Vendor and pricing research

PeptidePal is a tracking and education app and doesn't advertise vendor features. This is where the two differ most: Peptide Library's Shop groups listings by compound and product form, shows price per mg within the same form, carries vendor coupon codes 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 PeptidePal'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 PeptidePal

PeptidePal's App Store In-App Purchases list monthly prices from $8.99 to $14.99, a $39.99 quarterly plan and yearly prices from $29.99 to $59.99; what the free tier includes isn't stated. Peptide Library Pro is $4.99 a month, $39.99 a year or $89.99 once, and the free plan covers the library, vendor prices, logging and schedules.

Pricing in US dollars, checked October 25, 2026
PlanPeptide LibraryPeptidePal
Free accessFree1

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

Free download14Not verified

Neither the listing nor the site says what works without a subscription.

Monthly$4.9921$8.99–$14.9914

Four monthly prices are listed.

QuarterlyNot listed$39.9914
Annual$39.9921$29.99–$59.9914

Five yearly prices are listed.

Lifetime$89.9921Not listed
ModelFree plan; Pro subscription or lifetime purchaseFree download with subscriptions
  • 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.
  • PeptidePal: App Store In-App Purchases list several prices per plan; the price you see is shown in the app.

Fair is fair

Where PeptidePal wins

  • Several protocols side by side

    Its protocol builder is the centre of the app, and it keeps the protocol you designed and the one you are running the same.

  • On-device by default

    The developer says it never sees your protocols, doses or notes, and photo metadata is stripped before storage.

  • AI advisor and moderated forum

    Short educational answers in the app, plus a peer forum with reactions. Peptide Library has no in-app AI.

  • Level curves and photo time-lapse

    An estimated on-board level chart and time-lapse progress photos, neither of which Peptide Library offers.

Who it suits

Who should use which app?

  • You run several compounds on different schedules

    Either

    Both handle it; PeptidePal presents them as named protocols side by side.

  • You want your data to stay on your phone

    PeptidePal

    On-device by default with optional iCloud; no account needed for protocols.

  • You read the studies before you start

    Peptide Library

    Cited profiles and research statistics in the same app as your tracker.

  • You shop around between vendors

    Peptide Library

    Vendor listings, price per mg and coupon codes.

  • You prefer a one-time purchase

    Peptide Library

    A lifetime option alongside monthly and yearly plans.

Final verdict

The verdict on Peptide Library vs PeptidePal

PeptidePal is a capable, privacy-minded tracker with strong protocol tools. Peptide Library is the stronger choice when your process includes research and vendor comparison, or when you want the same account in a browser.

If you mainly log doses and rotate sites, both will serve you well. The deciding question is whether you want research and pricing in the same place as your tracker.

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

Try Peptide Library freeBrowse vendor prices

FAQ

PeptidePal vs Peptide Library: common questions

How many compounds are in PeptidePal's library?

Its App Store description gives both 110+ and 50+. We couldn't confirm a single figure, so we don't list one. Peptide Library has 200+ research profiles, counted live from the library.

Is PeptidePal available on Android?

Yes. PeptidePal: Peptide Tracker is on Google Play from Blank Labs, alongside the iPhone app. Neither listing mentions a web app; Peptide Library also runs in the browser.

Does PeptidePal store my data in the cloud?

The developer says protocol data stays on your device by default, with optional iCloud sync. Peptide Library's apps also keep data on the device; syncing between devices needs an account, and on iPhone it's part of Pro.

How much does PeptidePal cost?

The App Store lists monthly plans from $8.99 to $14.99, a $39.99 quarterly plan and yearly plans from $29.99 to $59.99 (US, checked October 2026). The price shown in the app is the one that applies.

Does PeptidePal compare vendor prices?

Not according to its listing or website. Peptide Library compares vendor listings and price per mg, always within the same product form.

Which app has an AI advisor?

PeptidePal does: it gives short educational answers and won't recommend doses or protocols. Peptide Library has no AI in the app.

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

PeptidePal app icon

PeptidePal

By Blank Labs (peptidepal.health)

PeptidePal – Peptide Tracker is developed by Blank Labs LLC (peptidepal.health).

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.PeptidePal – Peptide Tracker on the App Store (Apple App Store, read )
  15. 15.PeptidePal: Peptide Tracker on Google Play (Google Play, read )
  16. 16.peptidepal.health (Blank Labs, 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.