Comparison

PepOS vs Peptide Tracker Log & Reminder

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PepOS

Track peptide doses, build custom protocols, and monitor your body's response with AI insights. Integrates with Apple Health for comprehensive optimization tracking. Not medical advice.

Highlights
  • AI peptide intelligence
  • Protocol builder
  • Apple Health integration
  • Vial inventory tracking
  • Injection site rotation
  • Progress tracking
  • AI insights and reports
Features
Read full description

PepOS is the peptide protocol command center for biohackers who take optimization seriously. PepOS is an educational tracking and journal app. Not medical advice. Always consult a licensed healthcare provider before starting any peptide protocol. Track every dose, vial, and outcome. Build protocols by hand or let AI design them based on your goals. Close your daily rings — Execution, Progress, Recovery — and watch your 7-day optimization score climb. APPLE HEALTH + AI INSIGHTS Connect PepOS to Apple Health to see how your protocols are actually affecting your body. PepOS reads your weight, body composition, resting heart rate, HRV, and sleep data on your device and shows you trends alongside your peptide timeline. Weight entries you log in PepOS sync back to Apple Health automatically. With your separate permission, Peppy — our AI assistant — can also use a 30-day summary of your Health metrics to give protocol-specific insights ("your HRV has improved 14 ms since starting your current protocol") instead of generic advice. AI data sharing is optional, granular, and can be turned off anytime without disconnecting Apple Health. Your health data is never shared with advertisers and never used to train AI models. KEY FEATURES 260+ peptide library with detailed profiles, mechanisms, and educational dosing references Peppy — your AI peptide coach who knows your stack, your goals, and your history Smart protocol builder — manual, titration, on/off cycling, and transition planning Vial inventory tracking with cost-per-dose intelligence Injection site rotation across 8 regions with visual heatmap Daily check-ins for sleep, mood, energy, and side effects Blood work tracking with marker trends over time Progress photos with AI body composition analysis Weekly intelligence reports synthesized by AI Calendar sync, dose reminders, and protocol scheduling SUBSCRIPTION TIERS Free — 3 protocols, basic AI chat, 2 vials PepOS Intelligence ($9.99/mo or $59.99/yr, save 50%) — Unlimited protocols, unlimited AI, blood work tracking, AI blood analyzer, AI vial scanner, progress photo analysis, voice input, calendar sync, protocol sharing, transition planner, weekly intelligence reports, and priority AI Built by biohackers, for biohackers who don't settle for spreadsheets. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://app.pepos.app/privacy

About

Peptide Tracker Log & Reminder

This app helps users meticulously track peptide and GLP-1 doses, manage supplies, and monitor progress. It offers features like custom protocol building, injection site logging, and estimated plasma level visualization. Users can also sync with Apple Health and connect with a community for shared experiences.

Highlights
  • Build custom peptide and GLP-1 protocols
  • Log doses with notes and injection site tracking
  • Manage vial inventory and supplies
  • Visualize estimated plasma levels
  • Sync with Apple Health data
  • Track weight and progress photos
  • Connect with a community of users
Features
Read full description

Peptide Tracker is used by over 100,000 people. Track peptides and GLP-1s in one free app. Build your stack, log every dose, manage vials and supplies, monitor injection sites, visualize estimated plasma levels, sync Apple Health, follow your progress, and connect with people using the same compounds. Whether you’re managing one compound or a complex stack, keep your schedules, dose history, and inventory organized in one place. TRACK YOUR PROTOCOL Build Your Stack Create protocols with custom doses, schedules, frequencies, and durations. Add common peptides in seconds or create your own custom compounds. Log Every Dose Record scheduled or past doses, add notes, track injection sites, and edit entries anytime. When you correct a dose or change the vial it came from, your inventory updates automatically. Manage Vials and Supplies Keep track of mixed and unmixed vials, remaining volume, blend components, bacteriostatic water, and other supplies so you always know what you have on hand. See Your Estimated Levels Visualize how each compound builds and fades over time with an estimated plasma level curve based on your logged doses and the compound's half-life. Stay on Schedule Optional reminders help you stay consistent. See taken, skipped, and missed doses at a glance, follow your week with a simple checklist, and watch your consistency build a night sky you can share. FOLLOW YOUR PROGRESS Sync Apple Health Connect Apple Health to see your weight and body measurements, blood pressure, resting heart rate, HRV, sleep, steps, active energy, and nutrition in Pulse, on the same timeline as your doses. Peptide Tracker only reads from Apple Health and asks your permission first. Connect it from Settings or from Pulse. Track Your Weight Log your weight over time, follow the trend, and see your progress alongside the protocols you're running. Compare Progress Photos Take consistent progress photos with alignment tools that help you match your framing each time. Browse your photos by month, compare any two side by side, and share the result. Review Your History Browse your complete dose history in a calendar and quickly see what you took, when you took it, and which protocol it belonged to. CONNECT WITH PEOPLE ON THE SAME COMPOUNDS Ask questions and hear from people who have actually used the compounds you're researching or tracking. Share your own experience through structured answers, reply directly to others, and continue the conversation in open threads with quotes and mentions. Everyone participates under a username rather than a real name, with reporting, blocking, and community notes built in. LEARN AND EXPLORE Browse educational content covering peptide basics and use the Peptide Assistant for general peptide information. YOUR DATA STAYS YOURS Your protocol and progress are yours. Export your data by contacting us at any time or delete your account directly from the app. BUILT FOR PEPTIDE USERS Peptide Tracker was built around the real workflows, terminology, and challenges that come with managing peptide protocols. Track semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, GHK-Cu, CJC-1295, ipamorelin, NAD+, TRT, HRT, custom compounds, blends, and more. Built by peptide users, for peptide users. Peptide Tracker is for tracking and education only. Estimated plasma levels are provided for informational purposes and are not medical guidance. Peptide Tracker does not provide medical advice or replace guidance from a qualified medical professional. 100% free. No paywalls. No feature limits. Download Peptide Tracker and build your first protocol in minutes. Review our Terms of Use at https://peptidetracker.ai/terms and our Privacy Policy at https://peptidetracker.ai/privacy. Questions? Email us at hello@peptidetracker.ai

Screenshots

PepOS4 screens
Peptide Tracker Log & Reminder4 screens

Verdict

The call

The clearest difference is ratings volume: Peptide Tracker Log & Reminder at 2.8K against PepOS's 1. Peptide Tracker Log & Reminder also leads on update cadence (every 4 days vs fortnightly) and chart position (#185 vs unranked). On price, rating, review sentiment and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PepOS sells 2 in-app purchases, starting at $9.99 per month and Peptide Tracker Log & Reminder sells 8 in-app purchases, starting at $20.00 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for PepOS against 4.9 for Peptide Tracker Log & Reminder. That said, the two scores are not equally well evidenced: Peptide Tracker Log & Reminder has 2.8K ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 100% of PepOS's written reviews are positive against 97% of Peptide Tracker Log & Reminder's.

UpkeepUpdate frequency

PepOS ships an update fortnightly, Peptide Tracker Log & Reminder every 4 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 8 level
PepOS versus Peptide Tracker Log & Reminder: the parameters behind the verdict, then further details
ParameterPepOSPeptide Tracker Log & Reminder
PriceFreeFree
Rating5.0 (1 ratings) — better4.9 (2.8K ratings)
Positive reviews100.0% of reviews — better96.8% of reviews
Number of ratings12.8K — better
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank—#185 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size29 MB87 MB
Age rating17+17+
DeveloperDOHO DIGITAL, LLCFlat Six Labs LLC

Customer experience

PepOS

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Peptide Tracker Log & Reminder

All ratings2,824 ratings
Positive98.5%
Neutral0.8%
Negative0.6%
Written reviews346 reviews
Positive96.8%
Neutral0.9%
Negative2.3%

In-app purchases

2 purchases

PepOS

Subscriptions2
  • PepOS Intelligence14 Days trial$9.991 Month
  • PepOS Intelligence14 Days trial$59.991 Year
8 purchases

Peptide Tracker Log & Reminder

Subscriptions7
  • Founding Member$20.001 Year
  • Founding Member$30.001 Year
  • Founding Member$40.001 Year
Show 4 more
  • Founding Member$50.001 Year
  • Founding Member$60.001 Year
  • Founding Member$70.001 Year
  • Founding Member$80.001 Year
One-time1
  • Tip$5.00

Questions

Is PepOS free?
PepOS is free to download, with in-app purchases available.
Is Peptide Tracker Log & Reminder free?
Peptide Tracker Log & Reminder is free to download, with in-app purchases available.
Which has better reviews, PepOS or Peptide Tracker Log & Reminder?
PepOS is rated higher. PepOS averages 5.0 out of 5 from 1 ratings, while Peptide Tracker Log & Reminder averages 4.9 from 2.8K ratings.
Do PepOS or Peptide Tracker Log & Reminder have ads?
Neither PepOS nor Peptide Tracker Log & Reminder shows ads.
Which is updated more often, PepOS or Peptide Tracker Log & Reminder?
PepOS ships an update fortnightly, and Peptide Tracker Log & Reminder every 4 days. Most recently, PepOS was updated on October 31, 2026 and Peptide Tracker Log & Reminder on October 31, 2026.

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