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Best free peptide tracker

Free trackers vary in what they offer and where they run. This guide compares ChatPEP's tracker with eight others from the app stores, using only what each listing states.

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ChatPEP Team
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Free peptide trackers are common, but the free part covers different things and runs on different devices. This guide lays out what eight App Store trackers say in their own listings, with ChatPEP first. The right pick depends on which features you need and where you want to run it. None of the apps here tells you what to take; they are for logging and research.

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The one we make

ChatPEP includes a tracker called My Stack and Today, free on every plan 1. You can log entries, set dose reminders, and see how much is left in a vial 2. When you log an injection, the tracker records the next injection site in rotation 1. A vial card shows concentration, units per dose, and days remaining at your schedule 1. Interaction warnings check the compounds you name against your medications and health conditions 3. Answers to research questions carry numbered sources you can check 4.

To add a compound, the flow saves it in four screens 5:

  1. Tap the plus on My Stack or Today.
  2. Choose the compound name or type your own.
  3. Set the amount per entry, its unit, and route.
  4. Set a schedule and optional reminders.

The tracker records what you tell it and does not tell you what to do 1.

AppApp Store ratingsPriceFree to trackDose remindersDoses left per vialSite rotationReconstitution calculatorSyringes besides U-100Works in a browseriPhone appAndroid appChecked
ChatPEP (ours)Not listed yetFree planYesYesYesYesYesNoYesComing soonComing soon—
Peptide Tracker Log & Reminder2,712Free, in-app purchases $5.00 to $80.00YesYesYesYesYesNot stated in its listingNot stated in its listingYesYesOct 25, 2026
Regimen: Peptide Tracker533Free, in-app purchases $7.99 to $49.99YesYesYesYesYesNot stated in its listingNot stated in its listingYesYesOct 25, 2026
Injectly472FreeYesYesNot stated in its listingYesNot stated in its listingNot stated in its listingNot stated in its listingYesNot found on Google PlayOct 25, 2026
PepTracker: Peptide Tracker468Free, in-app purchases $2.99 to $99.00YesYesYesNot stated in its listingNoNot stated in its listingNot stated in its listingYesNot found on Google PlayOct 25, 2026
Peptide Tracker - PeptideKit306Free, in-app purchases $3.99 to $69.99YesYesYesYesYesNot stated in its listingNot stated in its listingYesYesOct 25, 2026
Peptide & TRT Tracker: OptiPin176Free, in-app purchases $4.99 to $34.99YesYesYesYesYesNot stated in its listingNot stated in its listingYesNot found on Google PlayOct 25, 2026
Peptides Calculator174Free, in-app purchases $9.99 to $199.99YesYesNot stated in its listingYesYesNot stated in its listingNot stated in its listingYesYesOct 25, 2026
Smart Peptide Tracker166Free, in-app purchases $0.00 to $39.99YesYesYesYesYesNot stated in its listingNot stated in its listingYesYesOct 25, 2026
ChatPEP is listed first because we make it. The others follow in order of how many ratings each has on the App Store.

What each listing says

Peptide Tracker Log & Reminder
Free to track: Yes
“Track peptides and GLP-1s in one free app.”
Dose reminders: Yes
“Optional reminders help you stay consistent.”
Doses left per vial: Yes
“Keep track of mixed and unmixed vials, concentrations, remaining volume, blend components, bacteriostatic water, and other supplies.”
Site rotation: Yes
“Record scheduled or past doses, add notes, track injection sites, and edit entries anytime.”
Reconstitution calculator: Yes
“Use built-in calculators for reconstitution, syringe-unit conversions, premixed blends, and half-life estimates without leaving the app.”
Regimen: Peptide Tracker
Free to track: Yes
“Free for your first compound, with no time limit.”
Dose reminders: Yes
“Get a reminder for every dose.”
Doses left per vial: Yes
“Track vials, pens, and tablets with low-stock alerts.”
Site rotation: Yes
“Log where you inject every dose, rotate your sites, and see your full injection history.”
Reconstitution calculator: Yes
“The Regimen peptide calculator handles reconstitution, dosing math, and unit conversion for any compound.”
Injectly
Free to track: Yes
“No ads, no subscription, and no tracking — just free help for staying on top of your regimen.”
Dose reminders: Yes
“Reminders that match your cadence — daily, weekly, or specific weekdays — with multiple reminders per protocol and the dose amount shown right in the notification.”
Site rotation: Yes
“Log each injection with dose, medication, date, time, route (SubQ/IM/IV), and injection site so you always have a searchable history — and can rotate sites.”
PepTracker: Peptide Tracker
Free to track: Yes
“The free plan includes up to 3 protocols, dose logging, reminders, vial supply tracking, calendar sync, the peptide library, and 30 days of weight history.”
Dose reminders: Yes
“Log every injection, get reminded before you miss one, and see how much is left in every vial.”
Doses left per vial: Yes
“Vial supply tracking with doses left, days left, and a refill reminder before you run out”
Reconstitution calculator: No
“It does not provide medical advice, diagnosis or treatment, and it does not calculate or recommend doses.”
Peptide Tracker - PeptideKit
Free to track: Yes
“100% free. No subscription. No paywall.”
Dose reminders: Yes
“Receive timely reminders that adapt to your schedule and preferences.”
Doses left per vial: Yes
“Keep track of mixed and unmixed vials, concentrations, remaining volume, blend components, bacteriostatic water, and other supplies.”
Site rotation: Yes
“Track injection sites”
Reconstitution calculator: Yes
“Use built-in calculators for reconstitution, syringe-unit conversions, premixed blends, and half-life estimates without leaving the app.”
Peptide & TRT Tracker: OptiPin
Free to track: Yes
“Start free: track your first compound completely free, with no time limit and no credit card.”
Dose reminders: Yes
“Discreet reminders: never miss a dose, with one-tap quick logging”
Doses left per vial: Yes
“Inventory, discard dates and low-stock alerts: never run out mid-protocol or use a vial past its window.”
Site rotation: Yes
“Injection site rotation: a customizable auto-advancing site map so you rotate properly”
Reconstitution calculator: Yes
“Unit conversion: enter the dose you were prescribed and the strength of your vial. OptiPin turns that into syringe units. You supply every number and it never suggests an amount”
Peptides Calculator
Free to track: Yes
“GLP-1 friendly logging — record units, dates, and notes for any peptide protocol”
Dose reminders: Yes
“Dose reminders, streaks, home-screen widgets, Apple Watch app, and iMessage protocol sharing”
Site rotation: Yes
“Log injection sites to help rotate locations and review your history.”
Reconstitution calculator: Yes
“Peptide reconstitution calculator — total amount (mg), diluent/BAC water volume, and units per insulin syringe or mL”
Smart Peptide Tracker
Free to track: Yes
“The dose log, vial tracker, peptide calculator, reminders and calendar are free.”
Dose reminders: Yes
“Set push notification reminders so you never miss an entry.”
Doses left per vial: Yes
“See how long your supply may last based on the protocols you enter.”
Site rotation: Yes
“Record each administration site on an interactive body map and review your rotation over time.”
Reconstitution calculator: Yes
“Enter the vial amount and the bacteriostatic water you add, and the peptide calculator works out concentration and volume from the values you enter.”

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Other free trackers

Peptide Tracker Log & Reminder is a free app with 2,712 ratings on the App Store and 733 ratings on Google Play 6. Its listing says it tracks mixed and unmixed vials, concentrations, remaining volume, blend components, bacteriostatic water, and other supplies 6. It includes optional reminders to help you stay consistent 6. It also lists built-in calculators for reconstitution, syringe-unit conversions, premixed blends, and half-life estimates 6. In-app purchases are founding member options from $5 to $80 6.

Regimen is free for your first compound, with no time limit, and has 533 ratings on the App Store and 332 on Google Play 7. Its listing says it tracks vials, pens, and tablets with low-stock alerts, and includes a reminder for every dose 7. It also lists a reconstitution calculator and injection site rotation 7. In-app purchases are a monthly plan at $7.99 or an annual plan at $49.99 7.

Injectly has no ads, no subscription, and no tracking, and it has 472 ratings on the App Store 8. It logs each injection with dose, medication, date, time, route, and injection site so you have a searchable history and can rotate sites 8. Reminders can be daily, weekly, or on specific weekdays, with the dose amount shown in the notification 8. It is not found on Google Play 8.

PepTracker has 468 ratings on the App Store and lists a free plan with up to 3 protocols, dose logging, reminders, vial supply tracking, calendar sync, and a peptide library 9. Its listing says vial supply tracking shows doses left, days left, and a refill reminder before you run out 9. In-app purchases include monthly, yearly, and lifetime options from $2.99 to $99 9.

Peptide Tracker - PeptideKit is a free app with 306 ratings on the App Store and 733 ratings on Google Play 10. Its listing says it tracks vials, components, bacteriostatic water, and supplies, and includes reminders and a reconstitution calculator 10. It also lists injection site tracking 10. In-app purchases range from a weekly plan at $3.99 to a lifetime plan at $69.99 10.

Peptide & TRT Tracker is free for your first compound, with no time limit and no credit card, and has 176 ratings on the App Store 11. Its listing says it includes inventory, discard dates, and low-stock alerts 11. It also lists discreet reminders, injection site rotation, and a unit conversion tool 11. In-app purchases include monthly and yearly subscriptions from $4.99 to $34.99 11.

Peptides Calculator has 174 ratings on the App Store and 35 ratings on Google Play 12. Its listing says it includes a reconstitution calculator, GLP-1 friendly logging, a vial tracker, and an injection log with site tracking 12. Dose reminders, streaks, and Apple Watch app are listed as built-in tools 12. In-app purchases include monthly and yearly premium access from $9.99 to $199.99 12.

Smart Peptide Tracker has 166 ratings on the App Store and 327 ratings on Google Play 13. Its listing says the dose log, vial tracker, peptide calculator, reminders, and calendar are free 13. It also lists site rotation on an interactive body map 13. In-app purchases include premium lifetime and add-ons from $0 to $39.99 13.

Where ChatPEP falls short

  • The calculator counts on a 100-unit syringe scale and does not offer U-40 or U-50 syringes 14.
  • The iPhone app is not on the App Store yet, so you use the web app on your phone 15.
  • The Android app is not on Google Play yet, so you use the web app on your phone 16.

Who this is not for

  • You want a native iPhone app right now, because ChatPEP's iPhone app is not on the App Store yet 15.
  • You want a native Android app right now, because ChatPEP's Android app is not on Google Play yet 16.
  • You need U-40 or U-50 syringe support, because the calculator counts on a 100-unit scale 14.

Compound pages

BPC-157Gastric-derived peptide studied for tissue repair and cytoprotection.GHK-CuA copper-binding peptide that signals tissue repair and remodeling.IpamorelinSelective ghrelin mimetic that triggers a growth hormone pulse.

References

  1. 1.Track your doses with TodayChatPEP Help Center · 2026
  2. 2.Dose remindersChatPEP Help Center · 2026
  3. 3.Interaction warningsChatPEP Help Center · 2026
  4. 4.Research only: what that meansChatPEP Help Center · 2026
  5. 5.Save what you are researching in My StackChatPEP Help Center · 2026
  6. 6.Peptide Tracker Log & Reminder on the App Store, checked October 25, 2026Flat Six Labs LLC · 2026
  7. 7.Regimen: Peptide Tracker on the App Store, checked October 25, 2026Awaken Labs LLC · 2026
  8. 8.Injectly on the App Store, checked October 25, 2026Matthias Gattermeier · 2026
  9. 9.PepTracker: Peptide Tracker on the App Store, checked October 25, 2026Jayven Alan Villagomez Peredo · 2026
  10. 10.Peptide Tracker - PeptideKit on the App Store, checked October 25, 2026Jamal Baga · 2026
  11. 11.Peptide & TRT Tracker: OptiPin on the App Store, checked October 25, 2026Vitaloom LTD · 2026
  12. 12.Peptides Calculator on the App Store, checked October 25, 2026Sphnix, Inc · 2026
  13. 13.Smart Peptide Tracker on the App Store, checked October 25, 2026Sean Hussain · 2026
  14. 14.Use the reconstitution calculatorChatPEP Help Center · 2026
  15. 15.ChatPEP on the web, iPhone, and AndroidChatPEP Help Center · 2026
  16. 16.ChatPEP on AndroidChatPEP Help Center · 2026

Weigh the named apps for one search, from their store listings

ChatPEP answers from the studies, with every source cited, and never tells you what to take.

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