Peptide LibraryApp comparison • 2026
Peptide Library vs Shotsy: GLP-1 Medication Tracker or Peptide Research Platform?
Two apps with different jobs. This comparison shows where each one fits, and when Shotsy is the better pick.
Last verified · Published by Peptide Library, which has a commercial interest in this comparison. How we compare
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.
Shotsy
By Shotsy Co. (shotsyapp.com)
A GLP-1 medication tracker for weekly injections and daily pills, with estimated medication levels, side effects, nutrition and PDF reports for care-team visits.
Quick verdict
Peptide Library or Shotsy?
Shotsy isn't a peptide research app and doesn't try to be. It's a GLP-1 medication tracker for weekly injections and daily pills, with estimated medication levels, side effects, nutrition and PDF reports for care-team visits, and most of it is free. If you take a GLP-1 medication and want to stay on schedule, Shotsy is built for exactly that. Peptide Library is for people researching and organising several peptides: cited profiles, vendor price comparison, inventory and tracking.
Peptide Library
Choose Peptide Library if…
- You research or track peptides beyond GLP-1 medications.
- You manage vials, capsules or sprays and want stock levels, run-out and reorder dates.
- You compare vendors for research compounds by listing and price per mg.
- You want cited research profiles and a web app.
Shotsy
Choose Shotsy if…
- You take a prescribed GLP-1 medication, as an injection or a pill, and want a dedicated tracker.
- You want estimated medication-level charts for the GLP-1 medicines it supports.
- You want PDF reports to bring to appointments.
- You want free nutrition and side-effect tracking alongside your doses.
At a glance
Feature comparison: Peptide Library vs Shotsy
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
| Feature |  Peptide Library |  Shotsy |
|---|---|---|
| Compound library | 200+ profiles7 | Not advertised Covers GLP-1 medications, not a peptide library. |
| Cited research references | Yes7 PubMed, ClinicalTrials.gov, DailyMed and EMA references on profiles. | Not advertised |
| Publication and trial data | Yes8 Research Intelligence Center: publication and trial statistics. | Not advertised |
| Community research trends | Not advertised |
Vendor discovery4 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Vendor directory | Yes10 | Not advertised |
| Vendor price comparison | Yes11 | Not advertised |
| Price per mg | Not advertised | |
| Vendor reviews | Yes10 | Not advertised |
Availability4 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| iPhone app | Yes3 | Yes15 |
| Android app | Yes4 | |
| 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 | Core features free14 |
Inventory4 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Vial inventory | Yes (free: 1 peptide)1 | Not advertised |
| Low-stock or run-out alerts | Yes4 Run-out and reorder dates with stock alerts. | Not advertised |
| Expiry dates | Yes4 | Not advertised |
| Stock deducted on logging | Yes4 | Not advertised |
Tracking2 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Dose logging | Yes15 Injections and oral pills; several medications at once. | |
| History and calendar | Yes4 | Yes15 |
Scheduling3 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Recurring schedules | Yes1 | Yes15 |
| Reminders | Yes15 Countdowns and next-dose notifications. | |
| Cycles and titration | Yes4 On/off cycles, every-N-days, several times a day and titration. | Titration schedules14 |
Calculations2 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Reconstitution calculator | Not advertised | |
| Estimated level charts | No1 Profiles list half-lives; there is no modelled level chart. | For GLP-1 medications15 Charts for semaglutide, tirzepatide, liraglutide and dulaglutide. |
Metrics and progress4 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Weight and body metrics | Yes1 | Yes15 |
| 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. | |
| Injection-site rotation | In the apps, not on the web4 | Yes14 Rotation map with next-site suggestions. |
Nutrition and wellness1 feature
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Nutrition tracking | No1 | Yes15 Calories, protein, water and fiber. |
Community1 feature
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Community | Not advertised |
Integrations4 features
| Feature | Peptide Library | Shotsy |
|---|---|---|
| Apple Health | Yes6 Reads weight and body fat; never writes. | Yes15 |
| 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. | Yes15 |
AI1 feature
| Feature | Peptide Library | Shotsy |
|---|---|---|
| AI assistant | No1 No AI in the app. A public, read-only MCP server lets AI assistants look up library profiles. | Not advertised |
Want research, vendor prices and tracking in one place? Peptide Library has a free plan.
The difference
What makes Peptide Library different?
One drug class, or many peptides
Shotsy supports GLP-1 receptor agonists for weight management and type 2 diabetes. Peptide Library covers 200+ peptide profiles and lets you track any compound, including GLP-1s.
Inventory
Shotsy's listing and site don't mention vials or stock. Peptide Library tracks vials, capsules, nasal sprays and ready-to-use containers, deducts stock as you log and forecasts when to reorder.
Clinical charts or research references
Shotsy's medication-level charts draw on published clinical data for four GLP-1 medicines. Peptide Library cites studies on each profile and publishes research statistics, but doesn't chart levels.
Care team or research workflow
Shotsy produces PDF reports for appointments. Peptide Library is organised around research: profiles, comparisons, trends and vendor information next to your log.
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?
Shotsy focuses on the medicines it supports: its estimated medication-level charts are based on peer-reviewed clinical data for semaglutide, tirzepatide, liraglutide and dulaglutide. It does not advertise a compound library or research references.
Peptide Library's 200+ profiles cover a much wider range of peptides, each with cited sources and evidence labels. The Research Intelligence Center publishes publication and clinical-trial statistics, and Peptide Trends shows what the community researches.
Browse the 200+ research profiles · See the Research Intelligence Center
Tracking
Tracking, scheduling and inventory workflows
Shotsy logs an injection or a pill with a single tap, supports several medications with separate schedules, counts down to the next dose and plans titration. Its rotation map suggests the next injection site, and side effects can be linked to doses, sites, nutrition or hydration.
Peptide Library logs any compound, with schedules for every day, chosen weekdays, every N days, on/off cycles, several times a day and titration. The apps rotate injection sites on a body map, and each dose can draw stock from inventory.
Vendors
Vendor and pricing research
Shotsy is a medication tracker and doesn't advertise vendor features, which suits prescribed medicines filled by a pharmacy. Peptide Library's vendor tools serve people comparing research-compound listings: offers by compound and form, price per mg and vendor 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.
Screens
Inside Peptide Library
Screens from Peptide Library on the web and in the app. We don't show Shotsy's screens; see its store listing for those.
Body metrics with trends, next to your logs. 
A calendar of what was logged and what is next. 
Inventory with uses left, run-out dates and reorder alerts. 
Schedules, reminders and a daily log with streaks.
Pricing
Pricing: Peptide Library vs Shotsy
Shotsy's website says its core features are free, including dose and side-effect tracking, weight charts and nutrition logging; the App Store lists premium plans from $9.99 to $14.99 a month and $39.99 to $59.99 a year. Peptide Library's free plan includes tracking, and Pro is $4.99 a month, $39.99 a year or $89.99 once.
| Plan | Peptide Library | Shotsy |
|---|---|---|
| Free access | Free1 Library, vendor prices, logging, schedules, journal and metrics are free. Inventory is limited to 1 peptide. | Free14 Dose and side-effect tracking, weight charts and nutrition logging are free. |
| Monthly | $4.9921 | $9.99–$14.9915 |
| Annual | $39.9921 | $39.99–$59.9915 |
| Lifetime | $89.9921 | Not listed |
| Model | Free plan; Pro subscription or lifetime purchase | Free core features; optional premium tools |
- 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.
- Shotsy: The App Store lists several prices per plan without naming the premium tools; check the app for current pricing.
Fair is fair
Where Shotsy wins
Purpose-built for GLP-1 medications
Injections and daily pills, with pill tracking on iPhone, and schedules built around weekly doses.
Medication-level estimates
Charts based on published clinical data for the GLP-1 medicines it supports.
Reports for your care team
PDF reports designed for appointments.
A generous free tier
Dose and side-effect tracking, weight charts and nutrition logging are free.
Who it suits
Who should use which app?
You take a prescribed GLP-1 and want to stay on schedule
Shotsy
Shotsy is designed around that routine.
You research several peptides
Peptide Library
Cited profiles and comparisons across the library.
You share progress with a clinician
Shotsy
PDF reports built for appointments.
You buy research compounds and compare vendors
Peptide Library
Vendor listings, price per mg and reviews.
You take a GLP-1 and research other peptides
Either
Shotsy for the medication routine, Peptide Library for research; Peptide Library can also track the GLP-1 alongside other compounds.
Final verdict
The verdict on Peptide Library vs Shotsy
If your focus is a prescribed GLP-1, Shotsy is the more specialised tool and most of it is free. Peptide Library doesn't try to replace that; it's for people who research and organise several peptides and want inventory and vendor information in the same place.
Many readers will only need one of the two. If you need both, they cover different ground.
Get the Peptide Library app, or start on the web without an account.
FAQ
Shotsy vs Peptide Library: common questions
Is Shotsy a peptide tracker?
Shotsy is a GLP-1 medication tracker. It covers semaglutide, tirzepatide, liraglutide and dulaglutide as injections and pills, rather than research peptides in general.
Is Shotsy free?
Its website says the core features are free. The App Store also lists premium plans from $9.99 to $14.99 a month and $39.99 to $59.99 a year (US, checked October 2026).
Does Shotsy track vials or inventory?
Its listing and website don't mention inventory. Peptide Library tracks vials, capsules, nasal sprays and ready-to-use containers and deducts stock as you log.
Is Shotsy on Android?
Yes, Shotsy is on Google Play; its website says pill tracking is iPhone-only. Neither app store listing mentions a web app, while Peptide Library also runs in a browser.
Where does Shotsy store my data?
On iPhone, on the device with private iCloud sync. Its website says Android data is stored in Google Firebase. Peptide Library's apps keep data on the device with optional account sync.
Can Peptide Library track a GLP-1?
Yes. You can log any compound with schedules, reminders and inventory. It does not chart estimated medication levels the way Shotsy does.
Explore More Than Peptide Tracking
Research peptides, organize your tracking, manage inventory, and compare vendors in one place.
Free plan available. Pro adds unlimited inventory, sync on every device, export and more; see Free vs Pro.
Keep comparing
Related comparisons
Peptide Library vs Pep AIGLP-1 nutrition and wellness against broader peptide research.
Peptide Library vs Peptide TrackerA fully free tracker against a research platform that also tracks.
Peptide Library vs PeptidePalProtocol tracking with on-device privacy against research and vendor discovery.- Best peptide tracker apps in 2026All eight apps compared, with a pick for each kind of user.
See all peptide tracker comparisonsHow the Peptide Library tracking app works
Peptide Library
By Superfime LLC
Shotsy
By Shotsy Co. (shotsyapp.com)
Shotsy GLP-1 Tracker is developed by Shotsy Co. (shotsyapp.com).
Sources
Store listings and developer websites as read on the date shown. Competitor details can change after that date.
- 1.Peptide Library Free vs Pro (Peptide Library, read )
- 2.Peptide Library pricing (Peptide Library, read )
- 3.Peptide Library and Tracker on the App Store (Apple App Store, read )
- 4.Peptide Library and Tracker on Google Play (Google Play, read )
- 5.Install the Peptide Library web app (Peptide Library, read )
- 6.Peptide Library privacy policy (Peptide Library, read )
- 7.Peptide Library research profiles (Peptide Library, read )
- 8.Research Intelligence Center (Peptide Library, read )
- 9.Peptide Trends (Peptide Library, read )
- 10.Peptide vendor directory (Peptide Library, read )
- 11.Compare peptide prices and vendors (Peptide Library, read )
- 12.Peptide calculator (Peptide Library, read )
- 13.Peptide Library community discussions (Peptide Library, read )
- 14.shotsyapp.com (Shotsy Co., read )
- 15.Shotsy GLP-1 Tracker on the App Store (Apple App Store, read )
- 16.Shotsy - GLP-1 Tracker on Google Play (Google Play, 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.