SkinMax vs Stack
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
SkinMax
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Ready for a glow up? SkinMax reveals your skin's biological age in seconds and shows you exactly how to make it look younger. Transform Your Skin with AI-Powered Analysis Unlike traditional skincare apps, we don't just analyze problems, we measure your skin's real age and track how it changes over time. One photo reveals: - Your skin's biological age - Visible signs of aging (lines, wrinkles, texture) - Skin concerns (acne, dark spots, uneven tone) - Pore visibility and skin clarity Your Personalized Beauty Transformation Get recommendations designed specifically for your skin: - Custom skincare routine tailored to your biology - Ingredient guidance for younger-looking skin - Weekly tracking to see real improvements - Educational insights about achieving healthy, radiant skin Simple. Fast. Powerful. 1. Take or upload a photo 2. Get your skin age analysis in 30 seconds 3. Watch your skin improve week by week 4. Track every change with AI precision Start Your Skin Transformation Today Download SkinMax and discover what your skin can become. Photos and data are handled in accordance with our privacy policy. Premium Features Some features require a subscription. The Premium subscription provides access to advanced analysis and additional insights. Subscription Information Some features require a subscription. The Premium subscription is available for ā¬5.99 per month. Payment will be charged to your Apple ID account. The subscription automatically renews unless canceled at least 24 hours before the end of the current period. Legal Privacy Policy: https://cerulean-crabapple-4b9.notion.site/Privacy-Policy-2f0c1b3a8f52805284a5d16fbb8178fd Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Stack
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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 ā 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 ā 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 ā 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 ā 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 ā Rotate sites with an interactive body map that remembers your recent spots, so you can avoid reusing the same area. ⢠Apple Health Sync ā 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 ā 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 ā Snap a photo of your meal to estimate macros and keep nutrition alongside your protocol. ⢠AI Assistant ā Ask questions about your active stacks and protocols in a private chat built into the app. ⢠Metrics & Insights ā Clean charts and stats show how your protocol is trending over time. ⢠Home Screen Widget ā See your next dose and stay on track without opening the app. ⢠Shareable Protocol Card ā 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
Verdict
The clearest difference is update cadence: SkinMax at daily against Stack's every 8 days. SkinMax also leads on iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support 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
Both are free to download. SkinMax sells 2 in-app purchases, starting at $5.99 per month and Stack sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.
SkinMax ships an update daily, Stack every 8 days. The most recent releases landed on May 16, 2026 and September 14, 2026 respectively.
| Parameter | SkinMax | Stack |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily ā better | Every 8 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 ā better | 18.0 |
| Further details ā not scored | ||
| Size | 39 MB | 136 MB |
| Age rating | 4+ | 17+ |
| Developer | Esteban Giorgetti | Amari Thomas |
In-app purchases
SkinMax
- SkinMax+ Monthly$5.991 Month
- SkinMax+ Yearly3 Days trial$39.991 Year
Stack
- Stack Weekly$9.997 Days
- Stack Yearly$49.991 Year




