Comparison

myStack vs Pep AI

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

Head to head
About

myStack

This app uses AI to analyze clinical studies and create personalized supplement recommendations based on your health goals, diet, and medications. It provides evidence-based advice, dosage suggestions, and summaries of scientific research, developed by experts.

Highlights
  • Personalized supplement stacks
  • AI-driven recommendations
  • Analysis of 10,000+ clinical studies
  • Medication interaction screening
  • Evidence-based supplement advice
  • Quality-vetted supplement curation
Features
Read full description

Supplement stacks built on evidence, not hope. myStack is a health intelligence app founded by a pharmacist with a PhD in nutrition. It reads 10,000+ human clinical studies so your choices don't come from influencer hype, retailer upsells, or generic lists. ONE GOAL IN. ONE TRUSTED STACK OUT. 1. Tell us — your goal in plain words, plus what you already take and your diet. 2. We read — every study behind a recommendation, summarized so you understand it in minutes, not hours. 3. You own it — saved, shareable with family and your provider, adjustable anytime, and auto-rechecked as your profile changes. FOUR CHECKS ON EVERY SUPPLEMENT • Interactions — screened against everything else you take before it's recommended. • Dose — the amounts that actually worked in studies, not the label's serving size. • Study strength — how solid the research is: size, design, and rigor, rated. • Fit for you — how well it matches your goal, profile, and diet. Not just what's popular. Nothing joins your stack without a verdict on all four. ONE PLACE TO EXPLORE, EVALUATE, AND BUY • Conditions — which supplements the evidence supports. • Supplements — how each one works, side effects, and research. • Research — the studies themselves: methods, results, and who funded them. • Market — third-party-tested products. Never sponsored. WHY myStack IS DIFFERENT • No ads. No sponsored products. Ever. • Your data stays private — never sold. • Caveats shown, not hidden — every study's limitations in plain language. Your first two stacks are free. For less than a bottle of the wrong supplement, Membership unlocks unlimited stacks — free for the first 14 days. myStack is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting supplements or changing your health routine.

About

Pep AI

This app helps you meticulously track peptide research, including inventory, logs, nutrition, wellness, and notes. It replaces scattered data with an organized, private system for consistency and offers features like injection site tracking, side effect logging, and AI-powered meal scanning.

Highlights
  • Inventory & Organization
  • Injection Site Tracker
  • Side Effects Tracking
  • Nutrition Logging
  • Meal Scanner
  • Apple Health Integration
  • Bloodwork Tracker
  • AI Insights
Features
Read full description

Pep AI is the GLP-1 tracker for shots, nutrition, side effects, weight, wellness, and everything in between. Track doses of Ozempic®, Wegovy®, Mounjaro®, Zepbound®, Foundayo®, semaglutide, tirzepatide, oral GLP-1s, and weekly injection routines. GLP-1 tracking shouldn’t mean scattered notes, forgotten injection sites, missed protein goals, and trying to remember how you felt after your last dose. Pep AI brings your routine together so you can stay consistent and understand your progress over time. TRACK SHOTS, DOSES AND INJECTION SITES • Log GLP-1 shots and doses • Give each medication its own dose schedule and reminder times • Track dose timing and history • Rotate injection sites with an interactive body map FOOD, PROTEIN AND WATER • Scan restaurant menus to compare meal options and see estimated protein, fiber and nutrition information • View an estimated GLP-1 Meal Score based on nutritional factors such as protein and fiber • Snap a photo of a meal for estimated nutrition and macros • Track calories, protein, carbs, fat and fiber • Quick Log meals and save frequently eaten foods • Log water and track hydration goals • Sync activity data with Apple Health • GLP-1 Meal Scores and nutrition information are estimates only and are not medical or dietary advice SIDE EFFECTS AND WELLNESS • Log nausea, fatigue, appetite changes and other symptoms • Track symptom timing and severity • See your symptoms alongside your dose history • Log energy and mood • Track sleep duration and quality PROGRESS • Track weight and trends over time • Add progress photos • Complete daily wellness check-ins • View your routine in a daily timeline • Earn achievements for staying consistent INSIGHTS AND REPORTS • View your tracking data in one dashboard • See patterns across nutrition, hydration, sleep, side effects and progress • View estimated medication levels and timing (estimates only, not medical advice) • Generate PDF reports to review with your healthcare provider WHY PEP AI Pep AI is built specifically for GLP-1 routines, giving you one simple place to stay organized and follow your progress. Pep AI is designed for tracking, organization and educational purposes only. It does not provide medical advice, diagnose conditions, recommend treatments, calculate doses or provide dosing instructions. Always consult your healthcare provider about medications, dosing, side effects or health concerns. A paid subscription is required to access Pep AI’s tracking features. Your data is stored securely and synced to your account. We never sell your health data. Support: support@pepaiapp.com Privacy: https://pepaiapp.com/privacy Terms: https://pepaiapp.com/terms

Screenshots

myStack4 screens
Pep AI4 screens

Verdict

The call

The clearest difference is review sentiment: myStack at 100% against Pep AI's 35%. myStack also leads on in-app purchases (none vs 10) and ads (none vs shown). Pep AI's advantage is update cadence (every 6 days vs every 3 months) and ratings volume (4K vs 7). On price 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. Pep AI sells 8 in-app purchases, starting at $9.99 per month. myStack asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

myStack holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Pep AI has 4K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 100% of myStack's written reviews are positive against 35% of Pep AI's.

UpkeepUpdate frequency

myStack ships an update every 3 months, Pep AI every 6 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard8 real differences · 2 level
myStack versus Pep AI: the parameters behind the verdict, then further details
ParametermyStackPep AI
PriceFreeFree
Rating5.0 (7 ratings) — better4.7 (4K ratings)
Positive reviews100.0% of reviews — better35.4% of reviews
Number of ratings74K — better
Update frequencyEvery 3 monthsEvery 6 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS14.1 — better16.4
Further details — not scored
Size2 MB135 MB
Age rating17+17+
DeveloperBalam LLCZode Development LLC

Customer experience

myStack

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Pep AI

All ratings3,983 ratings
Positive93.3%
Neutral1.9%
Negative4.7%
Written reviews175 reviews
Positive35.4%
Neutral6.3%
Negative58.3%

In-app purchases

None

myStack

No in-app purchases

8 purchases

Pep AI

Subscriptions8
  • Pep Month Updated3 variants$9.991 Month
  • Pep Discount Updated$29.991 Year
  • Pep AI Yearly3 Days trial$29.991 Year
Show 5 more
  • Pep AI Yearly$29.991 Year
  • Pep Year Updated$29.991 Year
  • Pep Year Updated3 Days trial$39.991 Year
  • Pep Year Updated3 Days trial$44.991 Year
  • Pep Year Subscription3 Days trial$49.991 Year

Questions

Is myStack free?
myStack is free to download, with no in-app purchases.
Is Pep AI free?
Pep AI is free to download, with in-app purchases available.
Which has better reviews, myStack or Pep AI?
myStack is rated higher. myStack averages 5.0 out of 5 from 7 ratings, while Pep AI averages 4.7 from 4K ratings.
Do myStack or Pep AI have ads?
Pep AI shows ads; myStack does not.
Which is updated more often, myStack or Pep AI?
myStack ships an update every 3 months, and Pep AI every 6 days. Most recently, myStack was updated on October 30, 2026 and Pep AI on November 5, 2026.

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