PepTracker and Dose Track are both peptide tracker apps, and both cover dose logging with a built-in compound library. They differ in three places. PepTracker is iPhone only, and in October 2026 it removed its reconstitution calculator to meet App Store guidelines. And the bigger one once your protocol gets serious: whether the app just logs your doses or actually models your levels over time.
Transparency note: Dose Track publishes this comparison. Everything about PepTracker below comes from its App Store listing and its website, checked October 31, 2026 and linked under Sources. Apps change quickly, so check its current listing before deciding.
Dose Track is the better pick for most people: your levels between injections rather than just your injection dates, the reconstitution math in the app, iPhone and Android, multiple compounds on one timeline, bloodwork read into it, research pages for 428 compounds and records stored on your phone. PepTracker is worth a look for the extras listed further down.
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| Feature | Dose Track | PepTracker |
|---|---|---|
| Reconstitution calculator | Yes, both directions, in the app and free on dosetrack.app | No. Removed in version 1.20 (October 2026) |
| Pharmacokinetic level charts (half-life) | Yes. An estimated curve for each medication it models, from its half-life | — |
| Injection-site rotation | Yes. Suggests the next site, with a rest window you set and a site history | Not listed |
| Vial & expiration tracking | Yes. Doses left in each vial, its mix date and use-by date, and a run-out warning | Vial supply, yes. Expiry not listed |
| Bloodwork / lab analysis | Yes. Reads lab PDFs and photos, or type results in, and keeps markers over time | — |
| Private by default (data on your phone) | Yes. Records stay on your phone, with no account needed | — |
| Where your data lives | On your phone by default. Optional encrypted backup only your password opens | Cloud backup and sync |
| Compound library | 800+ medications and supplements. 428 have a research page with how it works, safety, FDA status and references, most with studied doses. Plus guides and an interaction checker | Built-in peptide library |
| iOS | Yes. On the App Store now | Yes |
| Android | Yes. On Google Play now | No Google Play listing found (iPhone only) |
Reflects publicly listed features as of October 31, 2026. A dash means a feature wasn't advertised at the time of writing, not that it's impossible — confirm on the app's own listing.
PepTracker is a clean, approachable dose-log and protocol tracker for peptides, GLP-1 medications, and testosterone, with a built-in peptide library and vial supply tracking. It is rated 4.7 from 468 ratings on the App Store. If you are on iPhone and mainly want straightforward logging, it does that job well.
One recent change matters: version 1.20 (October 22, 2026) removed the Calculator tab to meet App Store guidelines, so the reconstitution math now has to happen somewhere else.
Dose Track is the only one of the two that models true pharmacokinetics — every dose is charted as a decaying exponential against the compound's calibrated half-life and Tmax, so you see your actual plasma level between injections instead of just a log of dates. It ships with 800+ medications and supplements, parses bloodwork PDFs on demand, rotates injection sites automatically, and stores health records on your phone, with no account needed. Data only leaves it for features you choose, like AI answers and lab reading, and nothing is sold. It has a reconstitution calculator in the app on both platforms, plus a free one on this site. It runs on both iOS and Android.
Research is built in. Of the 800+ medications and supplements, 428 have a research page: how the compound works, its safety, FDA status and references, and for most, the doses studied in research. A Learn section adds guides, an interaction checker and a stack finder, and dosetrack.app has 650+ free compound pages. None of it is a dose recommendation.
This is the whole difference, so it is worth making concrete. Say you are running a peptide with a short half-life on a five-days-on, two-days-off schedule. A dose log tells you that you injected on Monday through Friday. It cannot tell you that by Sunday evening your estimated level has fallen further than it does on any other day of the week, or that the Monday dose is landing on a trough rather than topping up a plateau.
The same applies to a missed dose. In a log, a skipped Wednesday is a gap in a list. On a level chart it is a visible dip with a recovery curve, and you can see whether Thursday's dose brings you back to where you were or whether it takes until Saturday. That is the difference between knowing your schedule and knowing your exposure.
Dose Track builds that from each compound's calibrated half-life and Tmax rather than a generic curve, which is why the compound library matters as much as the charting does — a model is only as good as the constants underneath it.
It is worth being clear about the overlap. Both apps log doses against a protocol, both carry a built-in compound library, and both track vial supply so you know when a batch is running out.
For a single peptide on a steady protocol, that shared feature set covers most of what anyone actually needs day to day. The divergence starts when you want to know not just when you dosed but where your levels are right now.
Feature rows come from each app's public App Store or Google Play listing and its own website, checked at the date noted under the table. A dash means a feature was not advertised at the time of writing — not that the app cannot do it, and not that it will not be added. Dose Track publishes this page, so treat the framing as ours and the facts as verifiable: every claim about the other app can be checked on its own listing, and we would rather you did.
If something here is out of date, email hello@dosetrack.app and we will fix it.
If you want simple logging on an iPhone, PepTracker is a fine choice. If you want the reconstitution math in the app, want to actually see your levels between shots, run many compounds, analyze bloodwork, use Android, or keep your health data on your phone, Dose Track is the more capable peptide tracker.
The best peptide tracker is the one you'll actually open. Get Dose Track on the App Store (iOS 17+) and Google Play (Android):
Download on the App Store →
Get it on Google Play →
See also: Best Peptide Tracker Apps (2026) · Dose Track vs Shotsy · Dose Track features · Visit peptracker.app