Short answer: For several compounds at once on iPhone or Android, with vials, reminders and level charts, Dose Track (ours) covers the most. For simple logging on iPhone, PepTracker. For an MCP connector to AI assistants and an iMessage assistant, PeptIQ. For stack charts and an interaction map, Smart Peptide Tracker. The table and notes below show what each one does.
We compared the peptide tracker apps people ask about most in 2026 on what changes day-to-day use: a reconstitution calculator, level charts from each compound's half-life, injection-site history, vial and inventory tracking, privacy, and whether the app is on both iPhone and Android.
Transparency note: Dose Track publishes this comparison and lists itself first. We describe every other app from its public listing and website, checked October 31, 2026. Check current features on each app's own page before you decide.
At-a-glance comparison
← swipe to see all columns →
| Feature | Dose Track | PepTracker | PeptIQ | Smart Peptide Tracker |
|---|---|---|---|---|
| Reconstitution calculator | Yes, both directions | No. Removed in October 2026 | Yes | Listed on Android |
| Pharmacokinetic level charts (half-life) | Yes, for each medication it models | — | Yes | — |
| Injection-site rotation | Yes. Suggests the next site, with site history | Not listed | Yes | Site history on a body map |
| Vial & expiration tracking | Yes. Use-by dates and run-out warnings | Vial supply; expiry not listed | Yes | Yes |
| Bloodwork / lab analysis | Yes. Reads lab PDFs and photos, markers over time | — | Yes | Lab results with ranges |
| Private by default (data on your phone) | Yes. On your phone; optional encrypted backup | — | Data can stay on your device | Yes, stored locally; optional cloud sync |
| iOS & Android | Both | iPhone only | Both, plus web | Both |
Comparison reflects each app's publicly listed features as of October 31, 2026. A dash means the feature wasn't advertised at the time of writing, not that it's impossible — confirm on the app's own listing.
The ranked list
Dose Track
Our appDose Track is our app, built for people who track several compounds at once. You save each vial with the water you added, and every dose shows in insulin-syringe units with what is left in the vial and a run-out date. Reminders follow your own schedule, the injection site is logged with each shot and the next one suggested, and the Levels view estimates how much of each compound is in your system from its half-life and the doses you log. It has 800+ medications and supplements (BPC-157, ipamorelin, HGH, semaglutide, tirzepatide, testosterone esters and more); 428 of them have a research page with how the compound works, its safety, FDA status, references and, for most, the doses studied in research. It handles blends, reads bloodwork from a photo, and Pulse answers questions from your own log. Health records are stored on your phone, no account needed; data only leaves for features you choose, like AI answers and lab reading.
PepTracker
Clean & simplePepTracker is a focused dose-log and protocol tracker for peptides, GLP-1 medications, and testosterone, with a built-in peptide library and vial supply tracking. Version 1.20 (October 2026) removed its Calculator tab to meet App Store guidelines, and its listing says it does not calculate or recommend doses. It's a tidy, approachable option on iPhone if you mainly want simple logging and don't need level modeling.
PeptIQ
MCP and iMessagePeptIQ pairs tracking tools with peptide profiles and a glossary. It also has half-life charts, and your data can stay on your device or sync across your own devices. It's available on iOS and Android with web access, and it has an MCP connector for AI assistants like Claude and ChatGPT and an iMessage assistant you can text.
Smart Peptide Tracker
Stack analysisSmart Peptide Tracker leans into stack analysis, with a radar chart by category and a compound interaction map. It keeps data on your phone with optional cloud sync and a PIN lock, shows site history on a body map, and records lab results with their ranges. It started on Android and has been on iPhone since January 2026. It is rated 4.7 on both stores.
Peptide Tracker & Calculator
iPhone, on-devicePeptide Tracker & Calculator does more than its name says. Next to the reconstitution calculator it draws half-life curves, rotates injection sites, scans bloodwork, and carries a 100+ compound library, with data stored on your phone. If you're on iPhone and want a full tracker, it is a strong option.
Zest
New, not out yetZest is a new peptide tracker that was not in the App Store or on Google Play yet when we checked (both marked "coming soon" on October 31, 2026), so we describe it from its website. It shows a reconstitution calculator that draws the result on a syringe and works without an account, dose logging with a body map that suggests the next injection site, reminders, vial inventory with low-vial alerts, and a daily check-in for energy, mood, sleep and appetite. A 69-compound research library, guides for mixing and injecting, and Zest AI round it out. It is built around research peptides; GLP-1s, TRT, blends and bloodwork are not listed.
How we evaluated peptide tracker apps
We looked at the features that make a difference week to week:
- Level charts: does the app estimate levels from half-life and time to peak, or just log dates? With long half-lives (testosterone esters, GLP-1s, DAC peptides), steady state and troughs are easier to see on a chart.
- Reconstitution calculator: mg vial + bacteriostatic water → concentration and units to draw, for any vial size and BAC ratio.
- Reminders and history: dose reminders, injection-site rotation, and vial expiration warnings.
- Privacy: where your health data is stored, and when it leaves your phone.
- iPhone and Android: a tracker is only useful if it's on the phone you carry; iOS + Android matters if you ever switch.
Which app fits what you track
- A GLP-1 (Ozempic, Wegovy, Mounjaro, Zepbound or compounded): you want dose-step reminders, weight next to your doses and a side-effect log. Dose Track does all three; see GLP-1 tracking and the medication trackers.
- TRT: you want injection days, site history and labs over time (total and free T, estradiol, hematocrit). See TRT tracking.
- Research peptides from powder vials: you want the mixing math done once and every dose in syringe units. Any app with a reconstitution calculator helps; the free reconstitution calculator and BAC water calculator here work without an app.
- Blends: you want each draw to record every peptide in it. Dose Track saves a blend vial with the mg of each peptide; see peptide blends.
- Just a calculator: the free web calculators are enough. Several apps removed their calculators from iPhone in October 2026, so check before you pick one for that.
What Dose Track does not do
It is not a medical device and does not tell you what to take. The Levels view is an estimate from published half-lives, not a blood test. If you only need a one-off calculation, the free calculators on this site are the better fit.
Judging these apps by their store ratings instead? Star averages are unreliable at this sample size — see how to read peptide tracker app reviews.
Frequently asked questions
What is the best peptide tracker app?+
What is the best app for tracking results on semaglutide?+
How can I track my semaglutide progress?+
What app helps rotate tirzepatide (Mounjaro or Zepbound) injection sites?+
What is a good app for tracking side effects on semaglutide?+
Is there a calculator that estimates how long semaglutide stays in my system?+
Which peptide tracker apps work on both iPhone and Android?+
Is there a TRT symptom tracker app?+
What is the Zest peptide app, and is it out yet?+
Download Dose Track
On iPhone (iOS 17+) and Android.