See what's still active in your system.
An estimate from your own logged doses and each compound's half-life — a tracking tool, not medical advice.
PepLedger is a private research protocol tracker for iPhone. It helps people record doses, organize cycles, track body metrics and bloodwork, and review an estimated view of what may still be active from previously logged entries. The app supports 456 compounds and keeps protocol details organized in one place.
PepLedger is a personal tracking tool, not a medical device. It does not diagnose conditions, recommend treatment, prescribe substances, or replace guidance from a qualified healthcare professional. Estimates shown by the app are informational and depend on the accuracy of the data entered.
Download PepLedger on the App Store or start with the free research tools below.
See it in 30 seconds
Never miss a dose. See what's still active.
Track protocols without losing the details
Quick Log records a dose before the details are forgotten. Researchers can select a compound, amount, method, and site, or create a structured cycle with schedules and titration notes. The dashboard brings active cycles, today's schedule, recent entries, and progress information together so records are easier to review over time.
The Living dashboard uses a visual orbit to represent logged compounds and estimated system load. PepLedger also includes a Tactical interface for people who prefer a denser command-center presentation. Both themes use the same private records and tracking features.
Progress tools organize weight, body measurements, biomarkers, and other logged observations. The AI coach can help examine claims and locate source material, but its answers can be wrong and are not medical advice. Users should verify important information independently.
Free research tools and practical guides
Use the Peptide Dose & Reconstitution Calculator to convert an entered mg or mcg amount into mL and syringe units and check detailed vial and water arithmetic. Separate references are available for semaglutide calculations, tirzepatide calculations, retatrutide calculations, BPC-157 calculations, and TB-500 calculations.
Use the Units to mg Calculator with verified concentration to translate syringe markings into mass, the Reverse GLP-1 Dose Calculator for U-100 units to check mg and mcg from a known concentration, or the GLP-1 Level Plotter for an educational decay estimate. Each tool explains its formulas and limitations and does not recommend a dose.
The peptide half-life guide explains what half-life means in the context of a previously logged dose and why the app's active-system view is an estimate. Researchers who prefer paper records can download ten free printable dose log sheets in weekly, two-week, monthly, and per-cycle formats.
People comparing tracking options can also read the peptide tracker guide or explore the main PepLedger tracker overview. These pages explain the product's scope, privacy approach, and limitations without selling or supplying any compound.
Common questions about PepLedger
Is my protocol data private?
PepLedger is designed around private personal tracking. Review the privacy policy for details about account, protocol, analytics, and support data.
Is PepLedger medical advice?
No. PepLedger records information entered by the user and presents organizational tools and estimates. Nothing in the app or on this website is medical advice, and PepLedger does not sell or supply substances.
What does the free trial include?
The iPhone app offers a seven-day free trial. Current pricing and subscription terms are shown before purchase in the App Store. Users can also review the website's terms and conditions.
How can I get support?
Questions about the app, account, privacy, or website can be sent to info@pepledgerapp.com. Read PepLedger Support, About PepLedger, and the calculation methodology for more context.