Comparison

Peptide Atlas vs Stack

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

Head to head
About

Peptide Atlas

Features
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Peptide Atlas is a research-only field guide for exploring what has been published about peptides. Browse evidence-graded entries, citation summaries, regulatory context, safety notes, anti-doping flags, and plain-language research explanations. Atlas is built for curious readers, researchers, clinicians, coaches, and anyone who wants a clearer way to understand peptide literature without turning research into personal medical advice. What you can do with Peptide Atlas: • Explore a peptide library with evidence grades • Review citations and research maturity • Compare compounds side by side • Surface known safety concerns and regulatory notes • Ask the AI Guide for educational summaries • Save entries to revisit later • Contribute citations, edits, or accuracy flags for review The AI Guide helps explain evidence, compare uncertainty, summarize safety themes, and generate questions to ask a qualified professional. Peptide Atlas does not provide dosing, sourcing, administration instructions, diagnosis, treatment plans, or symptom-to-peptide recommendations. It is an educational reference, not medical advice.

About

Stack

Features
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Stack is the all-in-one tracker for peptides, GLP-1 medications, and TRT protocols. Log every injection, build custom dosing schedules, 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. • Reconstitution Calculator — Take the guesswork out of mixing. Enter vial amount, diluent volume, and target dose to get the exact mL or insulin-syringe units to draw. • 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.

Screenshots

Peptide Atlas4 screens
Stack4 screens

Verdict

The call

The clearest difference is in-app purchases: Peptide Atlas at none against Stack's 2. On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Stack sells 2 in-app purchases, starting at $9.99 per 7 days. Peptide Atlas asks for nothing beyond the download.

Scorecard1 real difference Ā· 5 level
Peptide Atlas versus Stack: the parameters behind the verdict, then further details
ParameterPeptide AtlasStack
PriceFreeFree
Update frequency—Every 8 days
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.0
Further details — not scored
Size15 MB136 MB
Age rating17+17+
DeveloperTremaine GrantAmari Thomas

In-app purchases

None

Peptide Atlas

No in-app purchases

2 purchases

Stack

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

Questions

Is Peptide Atlas free?
Peptide Atlas is free to download, with no in-app purchases.
Is Stack free?
Stack is free to download, with in-app purchases available.
Do Peptide Atlas or Stack have ads?
Neither Peptide Atlas nor Stack shows ads.

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