Best Free Peptide Tracker Apps in 2026
Whether you're running BPC-157 for recovery, experimenting with a GLP-1 protocol, or managing a full peptide stack alongside supplements, keeping track of what you take matters. A good tracker helps you stay consistent, spot patterns, and have productive conversations with your healthcare provider.
But the peptide tracking app market has exploded. There are now over a dozen dedicated apps — most on iOS, a few on the web — and it can be hard to figure out which one actually fits your needs (and budget).
We tested every major peptide tracker available in early 2026. Here's what we found.
What to Look for in a Peptide Tracker
Before diving into specific apps, here are the criteria that actually matter when choosing a tracker:
- •Price. Some apps are free, some charge $5–15/month. For a simple logging tool, paying a subscription feels steep to many users.
- •Platform. Most trackers are iOS-only. If you're on Android or prefer not to download anything, your options narrow significantly.
- •Privacy. You're logging health data. Does the app require an account? Where is your data stored? Can you delete it?
- •Simplicity vs. features. Some people want a quick daily log. Others want reconstitution calculators, half-life tracking, injection site rotation, and progress photos. More features aren't always better.
- •Stack support. If you take multiple compounds (peptides + supplements), you need an app that handles that well.
The Contenders: Every Peptide Tracker Worth Knowing
1. Peptide Assistant
Our PickWeb (PWA) · Free · Any device
Full disclosure: this is us. Peptide Assistant is a free, web-based progressive web app (PWA) that works on any device with a browser — no App Store download required. You can add it to your home screen for an app-like experience.
The focus is on simple daily logging. Add your compounds (peptides, supplements, anything), log what you took each day, and review your history on a clean calendar view. It tracks streaks, lets you manage full stacks, and includes a compound library with popular peptides pre-loaded.
There's no reconstitution calculator or injection site tracker — it's intentionally simple. Your data stays private, and everything is free with no premium tier.
2. SHOTLOG
iOS + Android · Freemium · From the team that sells peptide accessories
SHOTLOG has become one of the most visible peptide trackers, partly because of its active presence on Reddit and partly because it does a lot. It tracks doses, weight, body measurements, progress photos, and side effects. Originally pitched as a GLP-1 companion app (Ozempic, Wegovy, Mounjaro), it's expanded to cover a broader range of peptides.
The company also sells physical peptide accessories — reusable pens, pen needles, travel cooler cases — which is a unique angle. The app is free to start, but some features are locked behind a subscription.
Best for: People who want a full-featured tracker with progress photos, weight tracking, and side effect monitoring — especially GLP-1 users.
3. PepTracker
iOS + Web · Freemium (2–3 free protocols) · peptracker.app
PepTracker is a well-designed app that focuses on protocol management and dose calculations. You can design, schedule, and manage peptide routines — simple or complex — with syringe visuals and custom presets. It includes integrated injection tracking, dose history, and reminders.
The free tier lets you manage 2–3 protocols. Unlocking unlimited protocols and advanced features requires PepTracker Premium. It also has a web presence at peptracker.app with a solid landing page and FAQ.
Best for: Users who want precise dose calculations with visual syringe guides and structured protocol scheduling.
4. Dosed (trackpeptides.com)
iOS · Paid / Freemium
Dosed takes a comprehensive approach to peptide tracking. It comes with a pre-loaded library of peptides across categories — GLP-1 medications (Ozempic, Wegovy, Mounjaro), TRT-related compounds (HCG, Sermorelin), healing peptides (BPC-157, TB-500, GHK-Cu), and cognitive peptides (Semax, Selank).
Standout features include a half-life calculator that tracks active compound levels based on research data, injection site rotation tracking, and smart protocol management with flexible scheduling (daily, weekly, specific days, custom intervals).
Best for: Power users who want half-life tracking, injection site rotation, and a deep compound library out of the box.
5. Peptide Log
iOS · Paid (one-time or subscription)
Peptide Log is one of the more established iOS trackers. It covers purchase tracking, dilution calculations, and custom mix management. Users praise it for being thorough — you can track "literally everything" according to App Store reviews — but it's a paid app with no free tier.
One concern: recent App Store reviews mention that iOS 26 has broken the app, causing crashes on launch. Hopefully a fix is incoming, but it's worth noting.
Best for: iOS users who want deep tracking including purchases, dilutions, and custom mixes — and don't mind paying.
6. Peptide Tracker & Calculator
iOS · Paid
As the name suggests, this app leans heavily into the calculator side of things — reconstitution math, dosage conversions, and the calculations that peptide users frequently need. It also includes basic tracking features, but the calculator is the main draw.
If your primary need is figuring out "how many units to draw for X mcg," this might be your tool. For pure daily logging, it's more than you need.
Best for: Users who primarily need reconstitution and dosage calculations alongside basic logging.
7. PepMetrics
iOS · Pricing TBD · pepmetrics.com
PepMetrics is a newer entrant in the peptide tracking space. Based on its landing page, it appears to focus on metrics and data visualization for peptide protocols. Details are still limited as the app is relatively new, but it's one to watch.
Best for: Worth keeping an eye on if you want data-heavy peptide analytics. Still early.
Comparison Table
| App | Platform | Price | Calculator | Stack Support | Unique Strength |
|---|---|---|---|---|---|
| Peptide Assistant | Web (PWA) | Free | — | ✓ Full | Simplicity, any device, free |
| SHOTLOG | iOS, Android | Freemium | — | ✓ | Progress photos, side effects |
| PepTracker | iOS, Web | Freemium | ✓ Advanced | ✓ (limited free) | Syringe visuals, scheduling |
| Dosed | iOS | Paid / Freemium | ✓ Half-life | ✓ | Half-life tracking, deep library |
| Peptide Log | iOS | Paid | ✓ Dilution | ✓ | Purchase & inventory tracking |
| Peptide Tracker & Calc | iOS | Paid | ✓ Full | Basic | Reconstitution math |
| PepMetrics | iOS | TBD | — | — | Data visualization (early) |
Our Pick: Why We Built Peptide Assistant
We're obviously biased, so take this with a grain of salt. But here's why we think Peptide Assistant deserves a look:
Most peptide trackers assume you need a reconstitution calculator, an injection site map, progress photos, and a subscription. That's great if you need all of that. But a lot of people in the peptide and supplement space told us (and keep telling Reddit) the same thing: "I just want a simple way to log what I took today."
That's what we built. A clean daily journal that takes seconds to update, works on any device (because it's a web app), costs nothing (because tracking your protocol shouldn't require a subscription), and keeps your data private.
If you need half-life calculations or progress photos, go with Dosed or SHOTLOG — they're solid. If you want precise syringe-level dose math, PepTracker is excellent. But if you want something simple, free, and that just works, we think you'll like what we've built.
Frequently Asked Questions
Is there a completely free peptide tracker?
Yes. Peptide Assistant is 100% free with no premium tier, no trial period, and no feature limits. A few other apps offer free tiers with limited functionality (like PepTracker's 2–3 free protocols), but most charge for full access.
Do I need an iPhone to track peptides?
No. While most peptide trackers are iOS-only, Peptide Assistant works in any web browser on any device — iPhone, Android, tablet, or desktop. SHOTLOG also offers an Android app.
Which peptide tracker has the best calculator?
PepTracker and Peptide Tracker & Calculator both offer strong reconstitution and dosage calculators. Dosed adds a unique half-life calculator. Peptide Assistant intentionally skips the calculator — it focuses on simple logging instead.
Are peptide tracker apps private?
It varies. Peptide Assistant keeps your data private and doesn't require an account. For other apps, check their privacy policies. Any time you create an account or sync to the cloud, your data is stored on someone else's servers.
Can I track supplements alongside peptides?
Peptide Assistant is built for this — you can log any compound including vitamins, minerals, and other supplements alongside your peptides. Most other trackers are peptide-specific.
What should I log when tracking peptides?
At minimum: the compound name, dose, and date. Many people also track time of day, injection site, how they feel, and any notes. The best tracker is the one you'll actually use consistently.
Ready to start tracking?
Peptide Assistant is free, private, and works on any device. No download required.
Start Tracking Free