Best 9 Peptide Logs in 2026: Which One Fits Your Protocol

Introduction

Peptide Tracker is the best peptide log app for tracking cycles, doses, and reminders on iPhone. We tested nine peptide log apps for iOS and Android, from simple dose logs to AI tools that analyze your whole protocol. No matter your goal, you’ll find a pick that fits your routine.

Quick Comparison Table

A quick overview of every app we reviewed: which platform it runs on, what it does best, and whether it’s free or paid.

1. Peptide Tracker

Best for: Replacing messy spreadsheets with a smart, scheduled protocol copilot.

Peptide Tracker acts like a protocol copilot that finally replaces manual spreadsheets. You pick a peptide from the built-in library of 30+ options, including GLP-1s, BPC-157, TB-500, and growth-hormone peptides. Set your dose and schedule, and you’re off. Every time you inject, tap “Injected” and the app logs the dose, site, and time. Next-dose countdowns and push notifications keep you on track without any guessing. Multi-peptide cycles are no longer stressful because each peptide gets its own schedule, and the clean interface shows exactly where you stand.

We gave it a direct download link for a reason: no other app we tested matched this blend of straightforward logging and reliable reminders. A reconstitution calculator shows syringe units, a supply tracker warns you before you run out, and titration ladders remind you when to step up your dose.

• Searchable library of 30+ peptides plus custom peptides
• One-tap injection logging with dose, site, and notes
• Smart reminders for your next dose, reorder alerts, and titration steps
• Reconstitution calculator that converts vial strength and water to syringe units
• Clean, stress-free handling of multi-peptide cycles

Get Peptide Tracker

2. Peptide Log

Best for: Researchers who stack peptides, rotate injection sites, and want deep protocol control.

Peptide Log gives you advanced multi-phase protocols so you can build layered cycles: an initial phase with one peptide and a second phase that stacks another, all without juggling separate logs. Interactive home screen widgets let you glance at your next dose without opening the app, and smart injection site rotation reduces the risk of scar tissue by prompting systematic site changes. Inventory monitoring tracks how many doses you have left and when to restock. It’s an iOS-exclusive peptide log that suits anyone who wants tight control over complex regimens and values at-a-glance dose visibility.

3. Peptide Tracker and Library

Best for: Android users who want a built-in molecular calculator and price comparisons before buying.

This app combines a peptide log with a searchable database and a molecular calculator that helps you double-check weights and reconstitution numbers. A vendor comparison engine pulls prices from trusted shops, so you can spot cost differences without opening a dozen browser tabs. While the logging features are straightforward, the real value is having a portable lab assistant that makes on-the-fly calculations simple. If you research peptides before you buy and prefer Android, it’s a solid free option.

4. PepTracker: Dose Log

Best for: Creating structured protocols with exact syringe volume calculations.

PepTracker eliminates the sticky notes and guesswork by building clear dose schedules for peptides and GLP-1 medications. A dedicated syringe volume calculator tells you exactly how many units to draw, which matters most when you’re using insulin syringes for precise dosing. You can set injection times, log with a tap, and review your dose log as a tidy history. It’s a focused peptide log that prioritizes measurement accuracy and schedule clarity over extra features.

5. Smart Peptide Tracker

Best for: Serious researchers who want stack synergy scores and titration support.

This Android app analyzes your stack across synergy, side-effect potential, and research backing, then gives you a composite score, not just a dose list. Titration support automates multi-step schedules so you scale up or down gradually without manual notes. The dosing guide helps you ground decisions in structured recommendations. It’s a peptide log with an analytical edge, aimed at users who treat regimen design like a research project.

6. Regimen: Peptide Tracker

Best for: Connecting every dose directly to health metrics.

Regimen links your peptide log to body weight, blood markers, and other metrics, making it easier to spot cause and effect. It covers peptides, GLP-1s, and TRT under one roof, so you aren’t tracking hormones separately. Custom scheduling, injection reminders, and a built-in reconstitution calculator keep your routine organized on Android. This approach helps you answer “what’s actually working?” instead of just recording injection times.

7. Peptide Tracker - PeptideKit

Best for: Viewing protocol results alongside weight loss, muscle growth, or hormone changes.

PeptideKit bundles smart protocol management with flexible scheduling and an intelligent reminder system that adapts to your set cycle. Progress tracking modules let you log weight, muscle measurements, or hormone-related symptoms so you can connect your peptide log to visible body changes. The app keeps things simple without a steep learning curve, making it a well-rounded iOS pick for users who want context around their doses.

8. Peptide AI: Stack Intelligence

Best for: Biohackers and longevity enthusiasts who want AI-driven analysis of cycles and biomarkers.

This app applies AI to your cycle logs, bloodwork results, and even body-composition scans to surface patterns and predictions. It grounds its insights in peer-reviewed literature, so the recommendations aren’t pulled from thin air. While it’s more of an analyst than a basic dose log, it fits users ready to go beyond simple tracking and treat their peptide log as part of a broader health experiment. It’s a paid iOS app focused on deep protocol intelligence.

9. SHOTLOG - Peptide Tracker

Best for: Biohackers on Android who want custom protocols plus full body-transformation tracking.

SHOTLOG manages custom protocols with exact syringe unit calculations: enter your dose and it tells you how many units to draw, so you avoid math errors. Vial inventory tracking prevents you from running out mid-cycle, and the app also monitors weight trends, body measurements, and nutrition intake. Together, these tools turn your peptide log into a complete picture of your transformation, helping you spot which changes are moving the needle.

How We Picked These Apps

We looked for real-world peptide log features, not just static databases or basic calculators. Scheduling quality, reminder reliability, and dose precision came first. Apps that only offer a note-taking shell without smart tracking didn’t make the cut. We prioritized candidates that work offline so your log doesn’t disappear with a weak signal, and we checked that user data stays on your device. Peptide Tracker earned the top spot because it balances ease of use and reminder consistency better than any other pick. No setup headaches, no missed nudges, and it handles multi-peptide cycles without turning your log into a maze.

Frequently Asked Questions

What should a peptide log app actually track?

A good peptide log app tracks the peptide name, dose, injection time, injection site, and any notes. Reminders are the real key. Flaky timing can mess up your protocol. The best apps give you a clear countdown and ping you when it’s time.

How do reconstitution calculators differ from syringe calculators, and which apps handle both?

A reconstitution calculator figures out how much bacteriostatic water to add to reach your target concentration. A syringe calculator turns that concentration into the units you need to draw. Peptide Tracker and a few others handle both, so you aren’t hopping between apps.

What should I look for in injection site rotation features?

Look for an app that prompts you to change sites on a schedule and logs where you last injected. Peptide Log does this automatically. Other apps let you note the site manually. Consistent rotation prevents lipohypertrophy (those lumps from repeated shots) and improves absorption.

Can free versions work, or do I need a premium tier?

Free versions handle basic logging and simple reminders just fine. Premium tiers usually add smart scheduling, full history, supply tracking, and the more advanced calculators. If you’re juggling multi-peptide cycles, a premium plan quickly pays for itself with way fewer missed doses and less stress.

The Verdict

Peptide Tracker is our top all-rounder for scheduling, dose logging, and smart reminders. It replaces spreadsheets and guesswork with a clean tool that keeps you consistent. Get Peptide Tracker on the App Store. If you want extras like AI-driven stack analysis or injection site rotation, the other eight picks handle those without bloating the core logging experience.