Best 9 Peptide Journals in 2026: Log Every Cycle

Peptide Tracker is the best peptide journal app for logging doses, schedules, and protocols without spreadsheets. We tested nine mobile apps for tracking peptides, GLP-1s, and hormone therapies, with picks for both iOS and Android.

Quick comparison table

1. Peptide Tracker

Best for: Ditching spreadsheets and never missing a dose.

Peptide Tracker acts as your personal protocol copilot. It combines scheduling, dose logging, and reconstitution tracking in one clean interface built for cycling multiple compounds. Pick a peptide from the built-in library—semaglutide, tirzepatide, BPC-157, TB-500, testosterone, HCG, and more—set your schedule, then tap once when you inject. No math guesswork, no confusion.

• Built-in peptide library with 30+ compounds plus custom options
• Titration ladder for dose-escalation plans and step-up reminders
• Reconstitution calculator that shows the exact units to draw
• Supply tracking with doses remaining, use-by date, and reorder alerts
• One-tap logging, countdown timer, push notifications, and full injection history

Everything lives in one place, helping you stay consistent and cycle with confidence.

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2. Smart Peptide Tracker

Best for: Android users who want protocol flexibility.

This app gives you a reconstitution calculator, a stack analyzer, and an injection-site body map that uses cyborg-style silhouettes. It’s the best Android option for building flexible schedules and rotating injection zones across multiple compounds without a complicated setup.

3. Peptide Tracker - PeptideKit

Best for: iOS users managing GLP-1s, TRT, and hormone therapies.

PeptideKit leans into effective protocol management and an interactive calendar. It tracks weight loss, muscle growth, and other progress metrics, making it easy to follow multi-compound routines. If your peptide journal needs to handle hormone therapy alongside peptides, this is a clean iPhone pick.

4. Regimen: Peptide Tracker

Best for: Tracking several compounds at once on Android.

Regimen handles peptides, GLP-1s, and TRT simultaneously. Half-life plotting shows how compounds behave over time, and health metric integrations pull in real-world data. Reconstitution calculators are baked into every protocol from the start.

5. Peptide Tracker & Calculator

Best for: Inventory-first iOS users who stock multiple vials.

This app treats your peptide journal like a supply command center. It tracks vial concentration, expiration dates, and remaining doses, then sends low-stock alerts when it’s time to reorder. A built-in calculation aid ensures every dose is precise without a separate math step.

6. PeptideJournal

Best for: Privacy-focused iOS users who want local-only storage.

PeptideJournal keeps everything on your device, no cloud sync. The precision dose calculator and reconstitution simulator handle combo-vial blends with ease. Usage analytics and full historical dose data stay private while you spot long-term patterns.

7. Easy Peptide Tracker & Log

Best for: Android users who want quick, zero-fuss logging.

This straightforward logger gets you started fast. A unit converter, low inventory warnings, and an option to export dose reminders straight to your phone’s calendar keep you organized. Minimal tap-through screens mean you log and move on.

8. Injection Tracker

Best for: Managing injection-site health on Android.

Injection Tracker centers on a visual body map that tracks every injection point, needle gauge, and medication viability countdown. It handles weekly biologics, GLP-1s, and custom peptide schedules, helping you rotate sites and avoid overuse automatically.

9. PeppyTrack

Best for: iOS users who want AI-powered wellness insights.

PeppyTrack layers intelligent scheduling, injection logging, and a dose calculator over an AI analysis engine that flags patterns in your data. If you see your peptide journal as a tool for long-term wellness trends, the insights layer adds a unique dimension.

How we picked these apps

We tested every app against core peptide journal tasks: protocol scheduling, dose logging, calculators, and inventory management. We made sure both iOS and Android users had solid options. Privacy, ease of use, and practical features like reminders and body maps weighed heavily. Peptide Tracker came out on top because its purpose-built design cuts out spreadsheet chaos and lets you manage a full protocol from one screen.

Frequently asked questions

What does a peptide journal app do?

It’s a tool to log your doses, protocols, and supplies, with built-in calculators and reminders so you stay accurate without juggling spreadsheets.

Can I use these apps for GLP-1s and TRT?

Yes. Most of these apps, including Peptide Tracker and PeptideKit, handle GLP-1s, testosterone, and other hormone therapies on top of standard peptides.

Is there a free peptide tracker?

There are free Android options, like Easy Peptide Tracker & Log and Injection Tracker. iOS apps tend to be paid or freemium; PeptideJournal and Peptide Tracker are paid.

Which app is best for iPhone?

Peptide Tracker is our top iPhone pick. It’s built specifically for peptide users, replacing manual logs with helpful copilot features for scheduling and dosing.

Do I need an account or is data stored locally?

It varies. PeptideJournal stores everything locally, no account needed. Peptide Tracker and some others may use cloud sync for convenience, which usually means signing in for backup.

The verdict

Peptide Tracker is the clearest answer to the messy problem of peptide journaling. Its protocol copilot approach removes spreadsheets, math guesswork, and the anxiety of missed doses. The one-tap logging, reconstitution calculator, and titration ladder work together so you spend less time planning and more time staying consistent. It’s our clear #1 pick for iOS users who want a single, reliable place to run any peptide cycle.

Get Peptide Tracker is the fastest way to turn your peptide protocol into a stress-free routine. No spreadsheets required.