Peptly vs Stack

Peptly is a private log for the peptides you already use. Write down each entry, get a reminder when the next one is due, follow your weight over time, and keep notes on your vials. Every peptide amount in Peptly is one you typed. FREE • Log one peptide, with Today and a reminder • Injection sites, with your next site suggested from your log • Your weight, with a 30-day trend • The last 30 days of your history • Plain-language profiles of 23 peptides PEPTLY PRO • Stacks: log every peptide you use • Unlimited reminders, with Log and Skip right in the notification • Your full history, with CSV export • Your long-range weight trend, and a 30-day projection: an estimate from your own entries if your recent trend continues, not a prediction or medical advice • Estimated levels for semaglutide and tirzepatide, from your own log and published half-lives. Estimated, not measured. • Vials: what the label says, the date and your notes, exactly as you wrote them TODAY See what's planned today. Log an entry as planned with one tap, or skip it, and your history stays complete. INJECTION SITES Pick a site as you log, and Peptly suggests the one you used longest ago, so rotating is easy. PRIVATE BY DESIGN No account to create. Your log stays on your iPhone or iPad. Peptly Pro is an auto-renewing subscription (weekly, monthly or yearly) or a one-time lifetime purchase; your region's price shows in the app before you buy. Payment is charged to your Apple ID account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel them in your Apple ID account settings. Peptly is a personal record-keeping tool. It never calculates, suggests or recommends an amount to take, and it is not medical advice. Follow the directions of your healthcare provider. Terms of Use: https://thepeptly.com/terms/ Privacy Policy: https://thepeptly.com/privacy/

Stack is the all-in-one tracker for peptides, GLP-1 medications, and TRT protocols. Log every injection, set your own schedule, 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. • 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.