--- title: "Peptide Library vs Peptide Tracker & Calculator: Privacy, Vials and Research" canonical_url: https://peptidelibrary.app/compare/peptide-library-vs-peptide-tracker-calculator description: "Peptide Tracker & Calculator keeps data on your iPhone. Compare it with Peptide Library on inventory, calculators, research, privacy and pricing." updated: 2026-10-25 publisher: Peptide Library notice: "Research and educational use only. Not medical advice." --- # 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. ## Quick verdict 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. ### 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. ### 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. ## Key differences ### 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. ## Research 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. ## Tracking 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 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. ## Pricing 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. ## Where Peptide Tracker & Calculator is stronger ### 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. ## Features | Feature | Peptide Library | Peptide Tracker & Calculator | |---|---|---| | iPhone app | Yes | Yes | | Android app | Yes | Not advertised | | Web app | Yes, installable | Not advertised | | Free plan | Yes (inventory: 1 peptide) | Free to start | | Dose logging | Yes | Yes | | History and calendar | Yes | Yes | | Recurring schedules | Yes | Yes | | Reminders | Yes | Yes | | Cycles and titration | Yes | Cycle planner in the calculator | | Vial inventory | Yes (free: 1 peptide) | Yes | | Low-stock or run-out alerts | Yes | Yes | | Expiry dates | Yes | Yes | | Stock deducted on logging | Yes | Yes | | Compound library | 200+ profiles | 100+ compounds and blends | | Cited research references | Yes | Yes | | Publication and trial data | Yes | Not advertised | | Community research trends | Yes (full view with Pro) | Not advertised | | Vendor directory | Yes | Not advertised | | Vendor price comparison | Yes | Not advertised | | Price per mg | Yes | Not advertised | | Vendor reviews | Yes | Not advertised | | Reconstitution calculator | Android and web | Yes | | Estimated level charts | No | Not advertised | | Weight and body metrics | Yes | Yes | | Progress photos | Yes (free: up to 2) | Not advertised | | Journal or symptom check-ins | Yes | Notes per dose | | Injection-site rotation | In the apps, not on the web | Yes | | Nutrition tracking | No | Not advertised | | Community | Discussions free; Q&A with Pro | Not advertised | | Apple Health | Yes | Yes | | Health Connect (Android) | Yes | Not advertised | | Wearables | No | Not advertised | | Home Screen widgets | iPhone only | Yes | | AI assistant | No | Not advertised | | Multi-device sync | Pro (free Android accounts sync most data) | Optional iCloud sync | | On-device storage | Yes | Yes | | Data export | Pro | Yes | ## Final verdict 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. ## Frequently asked 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). Comparisons use public listings and websites. "Not advertised" means no source we checked mentions the feature, not that it is missing.