Comparison

Kairo vs PepstackAI

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

Head to head
About

Kairo

This app is a comprehensive companion for individuals using GLP-1 medications. It helps track medication, nutrition, training, and labs, offering personalized insights and an AI coach to support your health journey.

Highlights
  • Medication logging with in-body estimates
  • Muscle preservation tracking
  • AI-powered personalized coaching
  • Nutrition tracking with food database
  • Guided workout programs
  • Blood work analysis and explanation
  • Daily readiness and pattern insights
Features
Read full description

Kairo tracks Zepbound®, Ozempic®, Mounjaro®, Wegovy® and every major GLP-1 — plus the peptides and hormones other trackers leave to you: BPC-157, retatrutide, CJC-1295, TRT and more, with a 104-compound library and estimated-level curves for 60+ compounds from published half-life data. See the estimated medication level in your body, know where today falls in your dose cycle — Absorbing, Peak, Stable, or Trough — and never miss a dose. FREE, FOR EVERYONE • Dose logging for your main medication plus two more compounds • Dose reminders on the days you choose — even 5 on, 2 off — and log right from the reminder • Your full dose history, always. Your records are never locked. • Weight in lbs or kg with a trend chart • Your estimated medication curve: the full curve for your first 14 days, and your current dose cycle after that • Site rotation, side effects and symptoms rated 1–10 • A weekly recap of what you logged • Next-dose widget and Siri: "Log my dose in Kairo", "When's my next shot" • Your next dose on Apple Watch • CSV export and encrypted backup — your data goes where you go • Switching from another tracker? Import your history via CSV during setup KAIRO PRO • Unlimited compounds — run GLP-1s, peptides and TRT side by side • Your full medication curve over time, with the projected level ahead • Results in Context — your change beside published clinical-trial averages, sources linked • Cycle comparisons across your own dose periods • Phase Alerts — a heads-up when your peak window starts • Smart reminders for supplements, water, refills and weigh-ins • Shot day on your Lock Screen — a Live Activity with one-tap logging, Dynamic Island included • Log from the widget or your Apple Watch without opening the app • Apple Health sync — weight, sleep, HRV, resting heart rate, and doses you mark Taken in Apple Health's Medications • Clinician Report — a clean PDF of your records for appointment day • Exclusive accent colors KAIRO INTELLIGENCE (with an active Pro subscription or trial) • An AI coach that answers with the weight, sleep, symptoms and logs you've actually recorded • Reads lab reports — markers extracted from a PDF or photo PEPTIDE & HORMONE PROTOCOLS • Estimated-level curves for 60+ compounds from published half-life data — or enter your own estimate • Stacks, cycles and planned off days • Labs & biomarkers — log 80+ markers and watch them trend • Supply tracking for vials, pens, or pills • A sourced education library on what each compound is and what it has been studied for PRIVATE BY DESIGN Your tracking data stays on your device. No account required. Nothing is sold or shared. Kairo Pro is an auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. Kairo is a wellness and self-tracking app for tracking and educational purposes only. It is not a medical device, does not recommend doses, and does not provide medical guidance, diagnosis, or treatment. Always follow your prescriber's instructions for your medication and dosage. Terms of Use: https://opportunelabs.app/terms Privacy Policy: https://opportunelabs.app/privacy

About

PepstackAI

This app helps you manage your supplement intake based on your personal routine and health goals. It provides personalized recommendations with research-backed reasoning and schedules them around your daily activities, avoiding potential conflicts.

Highlights
  • Personalized supplement recommendations
  • Routine-based scheduling
  • Conflict flagging for supplements
  • Research-backed product information
  • Peptide reference library
  • Intake logging and data export
  • Offline functionality
Features
Read full description

Pepstack helps you take the right supplements at the right time, built around your real routine, not a generic label. HOW IT WORKS Tell Pepstack your goals, your diet, and anything that's bothered you before. It builds a personalized shortlist from a catalog of real, sourced products, every pick shows the reason it was chosen, whether that's your goal, your diet, or a reaction you flagged. YOUR SCHEDULE, NOT A GENERIC ONE Add anything to your daily schedule and Pepstack places it around your actual day, your meals, your sleep window, instead of just a flat list of times. Known timing conflicts (like zinc and iron needing space between them) are flagged before they become a problem. BUILT ON REAL RESEARCH Every product in the catalog links back to real, verifiable research citations, not marketing copy. Ask a question and get an answer sourced from that same catalog, with a way to report anything that looks wrong. A REFERENCE LIBRARY, NOT A DOSING TOOL Pepstack also includes a peptide reference library for research purposes: what each one is, its general category, and research trends. It does not provide doses, protocols, or injection guidance for peptides. TRACK WHAT YOU ACTUALLY TAKE Log what you've taken, see your streak, and export your own data whenever you want. Your account and everything in it can be deleted at any time, right from the app. Pepstack works offline for your day-to-day tracking and syncs when you're back online. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pepstack.fit/privacy.html

Screenshots

Kairo4 screens
PepstackAI4 screens

Verdict

The call

The clearest difference is update cadence: Kairo at every 2 days against PepstackAI's every 11 days. Kairo also leads on ratings volume (11 vs 3). PepstackAI's advantage is rating (5.0 vs 4.7) and iOS requirement (15.0 vs 18.0). On price, review sentiment, ads and in-app purchases 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. Kairo sells 2 in-app purchases, starting at $9.99 per month and PepstackAI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

PepstackAI holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 11 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Kairo ships an update every 2 days, PepstackAI every 11 days. Both last shipped on October 31, 2026.

Scorecard4 real differences · 6 level
Kairo versus PepstackAI: the parameters behind the verdict, then further details
ParameterKairoPepstackAI
PriceFreeFree
Rating4.7 (11 ratings)5.0 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings11 — better3
Update frequencyEvery 2 days — betterEvery 11 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size26 MB18 MB
Age rating4+17+
DeveloperOpportune Labs LLCDeepak Kumar

Customer experience

Kairo

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PepstackAI

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Kairo

Subscriptions2
  • MomentumRx Pro$9.991 Month
  • MomentumRx Pro — Annual7 Days trial$69.991 Year
2 purchases

PepstackAI

Subscriptions2
  • Pepstack Pro (Monthly)$4.991 Month
  • Pepstack Pro (Yearly)$49.991 Year

Questions

Is Kairo free?
Kairo is free to download, with in-app purchases available.
Is PepstackAI free?
PepstackAI is free to download, with in-app purchases available.
Which has better reviews, Kairo or PepstackAI?
PepstackAI is rated higher. Kairo averages 4.7 out of 5 from 11 ratings, while PepstackAI averages 5.0 from 3 ratings.
Do Kairo or PepstackAI have ads?
Neither Kairo nor PepstackAI shows ads.
Which is updated more often, Kairo or PepstackAI?
Kairo ships an update every 2 days, and PepstackAI every 11 days. Most recently, Kairo was updated on October 31, 2026 and PepstackAI on October 31, 2026.

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