Comparison

Stackr vs Pepp AI

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

Head to head
About

Stackr

This app simplifies tracking peptide and GLP-1 doses, including supplies like vials and pens. It offers smart reminders, home screen widgets, and visual charts of estimated active levels based on half-life. Designed for users managing peptide protocols, it keeps your dosing information organized and accessible.

Highlights
  • Log peptide and GLP-1 doses
  • Track vials, pens, and other supplies
  • Smart reminders for next doses
  • Home screen widgets
  • Estimated active level charts
  • Multi-peptide stack tracking
  • Reference pages for common compounds
Features
Read full description

Stackr is the all-in-one tracker for your peptide and GLP-1 protocol. Every dose, vial and meal in one place, with the math done for you. KEY FEATURES • Dose tracking and reminders Log a dose in seconds from your Home screen. Run daily, weekly, every-few-days or specific-day schedules, and several protocols at once. Reminders make sure you never miss a dose, and Home Screen widgets show what's next. • Dose calculator Enter your vial strength, water and dose, and see exactly how many units to draw on a U-100 or U-40 syringe. Works in mcg, mg, IU and units. • Supplies and vials Track vials, pens and other supplies. Stackr counts down what's left every time you log and warns you before you run out. • Progress Keep your weight, progress photos and dose history together, with a calendar of taken and missed doses and estimated active levels from your logs. • Food and calories Snap a meal, scan a barcode, search a food or just say what you ate. Stackr tracks calories and protein against your daily plan. • Stackr Coach Ask the AI coach questions about your routine and your meals, any time. • Learn Reference pages for semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, GHK-Cu and 100+ more, with research status and sources. WHY STACKR • Built for GLP-1s and peptides, from one weekly shot to a full stack • Pounds or kilograms, mcg or mg, U-100 or U-40 • Syncs across your devices when you sign in • Message the team directly from Settings Stackr is a personal tracking and educational app. It does not give medical advice, prescribe treatments or tell you which peptide, dose or schedule is right for you. Always talk to a qualified healthcare professional. Active levels and photo-based nutrition values are estimates. SUBSCRIPTION Stackr is free to download. Full access requires a paid Stackr+ subscription. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getstackr.app/privacy

About

Pepp AI

Track peptide doses, log wellness metrics, and access a research library. Features AI-powered meal and body scans, personalized insights, and a private system for researchers.

Highlights
  • Peptide dose logging with injection site tracking
  • AI-powered meal and body composition analysis
  • Wellness tracking (sleep, mood, weight, bloodwork)
  • Research library with 75+ peptide profiles
  • Vial inventory management and reconstitution calculator
  • Exportable PDF reports for healthcare providers
Features
Read full description

Pepp AI is the all-in-one peptide tracking and wellness app built for serious researchers. Replace scattered notes and spreadsheets with one clean, private system designed for consistency. DOSE TRACKING - Log every dose with injection site, amount, and notes - Interactive body map tracks rotation sites - Medication level curve shows where you are in your dosing window - Schedule doses and never miss a protocol AI-POWERED FEATURES - Meal Scan — photograph any meal for instant macro breakdown - Body Scan — AI estimates body composition from a photo - AI Insights — personalized correlations across all your data - Pepp Bot — educational AI assistant for peptide research WELLNESS TRACKING - Bloodwork tracker with color-coded reference ranges and trend charts - Sleep tracker with weekly charts and monthly heatmaps - Progress photos with side-by-side comparison - Weight tracking with trend analysis - Daily check-ins for energy, mood, and sleep quality - Side effects log with severity ratings - Workout tracker RESEARCH LIBRARY - 75+ peptide profiles with mechanisms, half-lives, and research notes - Peptide interaction checker for compatibility and timing - Pep Learn — guided lessons with quizzes and XP rewards - Verified creator protocols from experienced researchers ORGANIZED & PRIVATE - Full inventory management with vial tracking and expiry alerts - Reconstitution calculator for precise syringe measurements - Export detailed PDF reports to share with your healthcare provider - Encrypted data accessible only to you - Optional biometric lock IMPORTANT DISCLAIMER Pepp AI is not a medical device and does not provide medical advice, diagnosis, treatment recommendations, or dosing instructions. All features are for personal record-keeping and educational reference only. Always consult a qualified healthcare professional before starting any protocol. Terms of Use: https://peppai.carrd.co | Privacy Policy: https://peppai.carrd.co Pepp AI Pro subscription required to access all features ($9.99/month or $39.99/year).

Screenshots

Stackr4 screens
Pepp AI4 screens

Verdict

The call

The clearest difference is rating: Pepp AI at 5.0 against Stackr's 4.4. Stackr's advantage is ratings volume (174 vs 2). On price, update cadence, 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. Stackr sells 7 in-app purchases, starting at $7.99 per 7 days and Pepp AI sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Pepp AI holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Stackr has 174 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Stackr ships an update every 4 days, Pepp AI every 3 days. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
Stackr versus Pepp AI: the parameters behind the verdict, then further details
ParameterStackrPepp AI
PriceFreeFree
Rating4.4 (174 ratings)5.0 (2 ratings) — better
Positive reviews66.7% of reviews—
Number of ratings174 — better2
Update frequencyEvery 4 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.0
Further details — not scored
Size88 MB12 MB
Age rating12+17+
DeveloperStackr Holdings LLCMarius Ferraro

Customer experience

Stackr

All ratings174 ratings
Positive87.4%
Neutral1.1%
Negative11.5%
Written reviews30 reviews
Positive66.7%
Neutral3.3%
Negative30.0%

Pepp AI

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

7 purchases

Stackr

Subscriptions7
  • Stackr+ Weekly$7.997 Days
  • Monthly$12.991 Month
  • Stackr+ Yearly$29.991 Year
Show 4 more
  • Stackr+ Yearly$49.991 Year
  • Stackr+ Yearly3 Days trial$49.991 Year
  • Stackr+ Yearly$59.991 Year
  • Yearly3 Days trial$69.991 Year
2 purchases

Pepp AI

Subscriptions2
  • Pepp Ai Monthly$9.991 Month
  • Pepp Ai yearly3 Days trial$39.991 Year

Questions

Is Stackr free?
Stackr is free to download, with in-app purchases available.
Is Pepp AI free?
Pepp AI is free to download, with in-app purchases available.
Which has better reviews, Stackr or Pepp AI?
Pepp AI is rated higher. Stackr averages 4.4 out of 5 from 174 ratings, while Pepp AI averages 5.0 from 2 ratings.
Do Stackr or Pepp AI have ads?
Neither Stackr nor Pepp AI shows ads.
Which is updated more often, Stackr or Pepp AI?
Stackr ships an update every 4 days, and Pepp AI every 3 days. Most recently, Stackr was updated on October 18, 2026 and Pepp AI on October 5, 2026.

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