Stackr vs Pepp AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Stackr | Pepp AI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (174 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 174 — better | 2 |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 88 MB | 12 MB |
| Age rating | 12+ | 17+ |
| Developer | Stackr Holdings LLC | Marius Ferraro |
Customer experience
Stackr
Pepp AI
In-app purchases
Stackr
- Stackr+ Weekly$7.997 Days
- Monthly$12.991 Month
- Stackr+ Yearly$29.991 Year
Show 4 moreShow fewer
- Stackr+ Yearly$49.991 Year
- Stackr+ Yearly3 Days trial$49.991 Year
- Stackr+ Yearly$59.991 Year
- Yearly3 Days trial$69.991 Year
Pepp AI
- Pepp Ai Monthly$9.991 Month
- Pepp Ai yearly3 Days trial$39.991 Year









