MyPepTracker vs Stacker

MyPepTracker is the most complete peptide protocol companion for iOS. Log and track every aspect of your peptide, GLP-1, and supplement stack — from reconstitution math to half-life pharmacokinetics, body transformation photos, and automatic iCloud sync. Your data lives in your iCloud account and never touches a third-party server. DOSE LOGGING & VIALS • Log doses with injection site, volume, notes, and backdating • Color-coded vial gauge shows mcg remaining and doses left at your current dose size • Vial burn-rate tracking with depletion countdown • Injection site rotation — recommends your most-rested site based on history • Log Session: dose your entire stack at once in one sheet • Cycle analytics: doses per week, total mcg delivered, injection site breakdown HALF-LIFE & PHARMACOKINETICS • Estimated serum concentration curves over ±48 hours for 100+ compounds • Sparkline decay curves on every Today card • Symptom overlay — see when side effects peak relative to compound levels • Standalone symptom logging at any time, with clustering pattern insights GLP-1 TITRATION • Auto-advancing titration protocols for Semaglutide, Tirzepatide, and Retatrutide • Tracks current phase, dose, and weeks until next escalation • Pre-fills the dose log with your current titration dose automatically SUPPLEMENTS & BLENDS • Track supplements from an 800+ item preset library or as custom entries with any dose unit • Custom blends for pre-mixed vials (CJC/Ipamorelin, BPC-157+TB-500) with locked component ratios BODY & PROGRESS • Body metrics: weight, waist, neck, chest, back, biceps, thighs, and body fat % • Progress photos with front/side/back/custom categories and side-by-side before/after comparison • Apple Health — reads sleep, resting HR, and HRV for protocol correlation; writes weight and body fat EXPORT & DATA • Protocol Summary PDF — polished one-page overview for your provider or records • Full data CSV export: peptides, vials, doses, symptoms, and body measurements in one file • Import dose history from JSON or CSV • Home Screen widget shows your next scheduled dose at a glance ICLOUD SYNC • Syncs automatically to iCloud — delete and reinstall and your data comes back • Install on a second device signed into the same Apple ID and your data follows you • No account required — uses your existing iCloud login PRIVACY • All data lives in your iCloud account — Apple's infrastructure only • No analytics, no tracking, no ads 100+ compound presets across GLP-1s, growth peptides, BPC/TB, nootropics, and more — with half-life data sourced from published literature.

Stacker is the peptide stack tracker. It's built to help you find the right stack for your goals, dose it correctly, and track whether it's actually working. Most peptide apps stop at "remind me to dose." Stacker takes you from goal → stack → results. BUILD YOUR PERSONALIZED STACK Tell us your goals — fat loss, muscle, recovery, skin, longevity, sleep — and Stacker recommends a named stack (LEAN, GLOW, Wolverine, KLOW) or the individual peptides that fit. Every stack comes with suggested doses, routes, and schedules you can adjust. CURATED STACKS WITH DOSAGE GUIDES Browse proven stacks with clear, per-peptide dosage guidance and difficulty levels — so you know exactly how to run GLP-3, BPC-157, TB-500, retatrutide, tesamorelin and more, not just what they are. TRACK DOSES & PROGRESS Log every dose in a tap, keep your streak, and watch your "Day X of N" protocol progress. Capture progress photos to see changes over time, and run check-ins on the metrics that matter for your goal. DOSING SCHEDULES & SMART REMINDERS Daily, weekly, or custom — Stacker generates the full schedule, anchors it to your real start date, and sends reminders so you never miss a dose. Evening catch-up nudges keep you honest. RECONSTITUTION CALCULATOR Step-by-step: exactly how much BAC water to add and how many units to draw for your dose — paired with a clear subcutaneous injection guide covering technique and site rotation. EXPERT-VETTED PEPTIDE LIBRARY A growing catalog with mechanisms, dosing ranges, cycle lengths, common stacks, and what to watch for — each peptide with Learn, Schedule, and Sources tabs so you go from research to running it in one place. AI PEPTIDE ASSISTANT Ask anything and get instant, informational protocol summaries and schedule checks. (Stacker Pro) BUY WITH MEMBER PRICING Order products through partner checkout, with member pricing on partnered products. (Stacker Pro) PRIVATE BY DEFAULT Your stacks, metrics, and photos are yours. We don't sell your data, and you can delete your account anytime. Stacker Pro Unlock progress photos, the AI peptide assistant, unlimited tracking, member pricing, and research & news. $69.99/year with a 3-day free trial. Payment is charged to your Apple Account after the trial; auto-renews until canceled. Manage or cancel anytime in Settings. Terms: https://usestacker.app/terms Privacy: https://usestacker.app/privacy Stacker is for educational and informational purposes only and is not medical advice. Always consult a qualified healthcare provider before starting any peptide protocol.