Comparison

Stack vs Pepper

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

Head to head
About

Stack

Features
Read full description

Stack is the all-in-one tracker for peptides, GLP-1 medications, and TRT protocols. Log every injection, set your own schedule, track your progress, and keep your full history organized in one private place. Built for adults working with a prescribing healthcare provider, Stack replaces scattered notes and spreadsheets with a simple, consistent system you control. You enter your own values (peptide name, dose, schedule, and sites) and Stack keeps them organized, reminds you, and shows your progress over time. FEATURES • Custom Protocols & Stacks — Build your own multi-peptide protocols with flexible schedules (daily, weekly, every X days, or custom). Run multiple stacks at once, each clearly organized. • Smart Dose Logging — Log every injection in seconds and see what's due today on your Home screen and calendar. A daily streak keeps you consistent. • Vial & Refill Tracking — Set how much each vial holds, watch it deplete with every dose, and refill in one tap. A tap-to-flip ring shows the exact percentage remaining. • Injection Site Tracker — Rotate sites with an interactive body map that remembers your recent spots, so you can avoid reusing the same area. • Apple Health Sync — Pull in weight, BMI, resting heart rate, HRV, sleep, steps, active energy, blood pressure, respiratory rate, body fat, lean mass, and VO2 max to see the full picture. • Progress Photos & Compare — Capture progress photos and view them side by side with weight and date overlays. Hide weight for privacy, then share a branded comparison. • Meal Scan — Snap a photo of your meal to estimate macros and keep nutrition alongside your protocol. • AI Assistant — Ask questions about your active stacks and protocols in a private chat built into the app. • Metrics & Insights — Clean charts and stats show how your protocol is trending over time. • Home Screen Widget — See your next dose and stay on track without opening the app. • Shareable Protocol Card — Generate a clean, branded card of your active protocol to save or share. PRICING Stack requires a subscription to unlock the full experience. IMPORTANT Stack is a personal record-keeping and organization tool for informational purposes only. It does not provide medical advice, diagnosis, or treatment, and is not a substitute for professional care. Always consult a qualified healthcare provider before starting, changing, or stopping any medication or protocol. Terms of Use (EULA): https://www.whatsyourstack.app/terms.html Privacy Policy: https://www.whatsyourstack.app/privacy.html Questions or feedback? Email us at contact@whatsyourstack.app.

About

Pepper

This app helps users meticulously track their peptide protocols, including doses, vial inventory, and side effects. It offers smart reminders, progress logging, and an educational library for reference. An optional subscription unlocks advanced features and community access.

Highlights
  • Dose logging with injection site tracking
  • Vial inventory management
  • Side effects and progress logging
  • Smart reminders for doses and supply
  • Educational peptide library
  • Community feed by compound
Features
Read full description

The all-in-one peptide tracker built for serious protocol users. Pepper keeps your stack, dose log, vial inventory, side effects, and bloodwork organized in one focused system. Replace spreadsheets and scattered notes with a clean, private app designed for the way real protocols run. Pepper is a record-keeping tool. You enter the doses and schedule set by your healthcare provider or product label. Pepper does not calculate, suggest, or recommend doses. Every feature below is included free. No purchase is required to use Pepper. FEATURES Dose Logging Log a dose in seconds: the amount you were prescribed, the time, and the injection site. Pepper keeps the running history for you. Vial Inventory Track every vial across your stack at a glance: label strength, start date, use-by date, and doses left based on the doses you log. Injection Site Rotation Interactive body-map picker. Each dose saves its site, so you can see where you've been and keep your rotation on track. Smart Reminders Push notifications for scheduled doses, use-by dates, and low supply, tuned to your cadence so you never miss a window and never get spammed. Calendar Events Optional: add your scheduled doses to a dedicated "Pepper" calendar in iOS Calendar. Alerts fire at dose time on every device the calendar syncs to. Side Effects & Progress Log how you feel, track weight and progress photos, and follow meals, steps, and sleep alongside your protocol. Sleep can sync from Apple Health. Bloodwork Tracking Log labs across hormones, lipids, liver, metabolic, and CBC. Pepper shows your values against reference ranges and trends them over time. Dose History Every log preserved in a calendar view you can look back on any time. Home-Screen Widgets See your next scheduled dose without opening the app. Peptide Library An educational library of common peptides covering mechanism, what they've been studied for, storage, and safety notes, with cited sources on every page. For reference only; it does not provide dosing guidance. Pepper Coach Ask questions about your logs, schedule, and supply. Answers that include health information link to their sources. Coach doesn't recommend or calculate doses. Crews A community feed organized by compound. Share progress and experiences with people on the same journey. Cross-Device Sync Sign in to sync your stack securely across iPhone and iPad. Sign in with Apple is supported, with no password required. Or use Pepper without an account. PEPPER PRO (OPTIONAL SUBSCRIPTION) Pepper Pro is an optional auto-renewable subscription that supports Pepper's continued development: • Monthly: $11.99 per month • Yearly: $29.99 per year, with a 7-day free trial for eligible new subscribers Payment is charged to your Apple ID account at confirmation of purchase (or at the end of the free trial). Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Prices may vary by region. Private & Secure We never sell your data. It's encrypted in transit and at rest, and access is scoped to your account. Health Disclaimer Pepper is designed for tracking and educational purposes only. It does not calculate, suggest, or recommend doses, and it is not intended to provide medical advice, diagnosis, or treatment. Always follow your healthcare provider's instructions and consult them for any medical decisions. team@appfrontrunners.com Privacy: https://pepperapp.framer.website/privacy Terms of Use (EULA): https://pepperapp.framer.website/terms

Screenshots

Stack4 screens
Pepper4 screens

Verdict

The call

The clearest difference is update cadence: Stack at every 2 weeks against Pepper's every 2 months. On price, ads, in-app purchases and device support 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. Stack sells 2 in-app purchases, starting at $9.99 per 7 days and Pepper sells 10 in-app purchases, starting at $11.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Stack ships an update every 2 weeks, Pepper every 2 months. The most recent releases landed on November 10, 2026 and November 7, 2026 respectively.

Scorecard1 real difference · 9 level
Stack versus Pepper: the parameters behind the verdict, then further details
ParameterStackPepper
PriceFreeFree
Rating—5.0 (22 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—22 — better
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size106 MB55 MB
Age rating17+17+
DeveloperAmari ThomasApp Frontrunners LLC

In-app purchases

2 purchases

Stack

Subscriptions2
  • Stack Weekly$9.997 Days
  • Stack Yearly$49.991 Year
10 purchases

Pepper

Subscriptions10
  • Pepper Pro$11.991 Month
  • Pepper Pro$19.991 Year
  • Pepper Pro$29.991 Year
Show 7 more
  • Pepper Pro7 Days trial$29.991 Year
  • Pepper Pro3 Days trial$29.991 Year
  • Pepper Pro7 Days trial$39.991 Year
  • Pepper Pro$39.991 Year
  • Pepper Pro$59.991 Year
  • Pepper Pro7 Days trial$59.991 Year
  • Pepper Pro$79.991 Year

Questions

Is Stack free?
Stack is free to download, with in-app purchases available.
Is Pepper free?
Pepper is free to download, with in-app purchases available.
Do Stack or Pepper have ads?
Neither Stack nor Pepper shows ads.
Which is updated more often, Stack or Pepper?
Stack ships an update every 2 weeks, and Pepper every 2 months. Most recently, Stack was updated on November 10, 2026 and Pepper on November 7, 2026.

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