Pep AI vs Biostacks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Inventory & Organization
- Injection Site Tracker
- Side Effects Tracking
- Nutrition Logging
- Meal Scanner
- Apple Health Integration
- Bloodwork Tracker
- AI Insights
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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
Biostacks
Easily manage your supplement intake with barcode scanning, AI assistance, and detailed insights. Track routines, monitor nutrient coverage, and analyze your stack's effectiveness and cost. Prioritizes user privacy with offline functionality and optional iCloud sync.
- Barcode scanning for supplement library
- AI-powered supplement routine analysis
- Customizable daily and cycle schedules
- StackScore for routine quality
- Potential interaction warnings
- RDA coverage and nutrient overlap analysis
- Mood, energy, and sleep trend tracking
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Biostacks is a supplement tracker. It does not tell you what to take. It shows the research behind supplements, additives, and interactions, with sources, and lets you run your own experiments on your own numbers. We make no health claims. Sources are research papers and meta-analyses on PubMed, NIH fact sheets, FDA and EU regulators, and the bodies that certify and license brands. Stack Analysis and research: • Supplement and medication interactions, from NIH Office of Dietary Supplements fact sheets and PubMed studies, each with a link • Synergies between supplements, from PubMed meta-analyses • Research coverage for 18 health goals, from sleep to longevity: what the meta-analyses found and the doses they studied • Upper limit warnings and RDA coverage for vitamins and minerals, from NIH and USDA reference values, with the harm NIH lists for going over • Additives checked against FDA GRAS rules and the EU food additive regulation • Brand records: NSF, USP, Informed Sport, Kölner Liste, NZVT, and Eurofins certifications, Health Canada licences, FDA warning letters, and FDA, UK, and French recall notices • Nutrient overlaps between products Experiments: • Daily check-ins on mood, energy, sleep, and focus • Metrics: weight, sleep, resting heart rate, HRV, steps, or any custom number, with Apple Health sync • Scan a lab report, blood test, body composition, or aging report from a photo or PDF, read on your phone, never uploaded • Run an N-of-1 trial: three weeks off and three weeks on, alternating weekly. The result says whether a metric moved, or "no effect" when it did not • Experiment results appear only after enough logged days Supplement scanner and vitamin tracker: • Barcode scanner with your camera, for supplements, vitamins, pills, and medicine • Search NIH DSLD and Open Food Facts, with popular brands available offline • Enter supplements, medications, doses, and nutrients manually • Ask Apple Intelligence (iPhone 15 Pro and newer) • Use your own assistant like Claude, ChatGPT, Grok, or Gemini to manage your stack with a copy-and-paste prompt Supplement schedule, pill and medication reminders: • Daily, specific weekdays, or on/off cycles like 5 days on, 2 off • Multiple times of day, from multivitamin to magnesium • Peptide tracker and peptide calculator: vial size, reconstitution, and draw volume • Dose reminders, with smart tuning when you keep logging late Dose log: • One tap per dose, mark a whole stack at once, long-press to skip and keep your streak • Progress rings, streaks, and dose logging by asking Siri • Taken, due, and upcoming groups, and a calendar with mood dots • Search, filter, notes, reorder, and dark mode • Adherence and Stack Analysis trends over 30, 90, or 365 days, with CSV export • Monthly cost per supplement and per stack, and running-low refill alerts On-device AI chat: • Review your routine, explain an ingredient, or change your stack by describing what you want • Every suggested change appears as a review you accept or reject, with undo Privacy first: • Works offline with no account • Your health data stays private, on your device • Optional backup and sync to your own iCloud • Snapshots and version history to roll back any change • Export everything as JSON or PDF, or share a stack as plain text Everyday intake tracking is free: dose logging, streaks, reminders, check-ins with trends, the library and barcode scanner, export, import, and backups. Biostacks Pro, an annual subscription with a 7-day free trial, adds Stack Analysis insights, check-in correlations, experiment results, report scanning, Apple Health metrics, historical trends, cost tracking, smart reminder tuning, cloud sync, and the on-device AI assistant. Whether you take vitamin D, omega-3, zinc, magnesium, creatine, collagen, or protein, or run a supplement stack with nootropics and peptides, Biostacks keeps the log, the research, and the experiments in one private place.
Screenshots
Verdict
The clearest difference is review sentiment: Pep AI at 36% against Biostacks's 0%. Pep AI also leads on update cadence (every 6 days vs every 2 weeks). Biostacks's advantage is ads (none vs shown). On price, in-app purchases, monetization model 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
Both are free to download. Pep AI sells 16 in-app purchases, starting at $3.99 per 7 days and Biostacks sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Pep AI ships an update every 6 days, Biostacks every 2 weeks. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.
| Parameter | Pep AI | Biostacks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (4K ratings) — better | — |
| Positive reviews | 35.6% of reviews — better | 0.0% of reviews |
| Number of ratings | 4K — better | — |
| Update frequency | Every 6 days — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 135 MB | 68 MB |
| Age rating | 17+ | 17+ |
| Developer | Zode Development LLC | Hmujo LLC |
Customer experience
Pep AI
Biostacks
In-app purchases
Pep AI
- Pep Week Updated$3.997 Days
- Pep AI Monthly2 variants$9.991 Month
- Pep Month Updated4 variants$9.991 Month
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- Pep AI Yearly Discount$19.991 Year
- Pep AI Yearly$19.991 Year
- Pep AI Yearly3 Days trial$24.991 Year
- Pep Discount Updated$29.991 Year
- Pep AI Yearly3 Days trial$29.991 Year
- Pep AI Yearly$29.991 Year
- Pep Year Updated$29.991 Year
- Pep Year Updated$34.991 Year
- Pep Year Updated$39.991 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
- Pep Year Subscription3 Days trial$59.991 Year
Biostacks
- Biostacks Pro - Monthly7 Days trial$3.991 Month
- Biostacks Pro - Annual14 Days trial$24.991 Year









