PepStack vs VialRhythm

PepStack is a reconstitution and dosing-math calculator and protocol scheduler for peptide researchers. CALCULATE WITH CONFIDENCE • Exact BAC-water volume, concentration, syringe units, and doses-per-vial • Supports U-100 / U-50 / U-40 / U-30 insulin syringes • Step-by-step reconstitution guide PLAN YOUR PROTOCOL • Build a weekly schedule and sync dose reminders • Log doses, track streaks, rotate injection sites • Reference library of common research peptides STAY ORGANIZED • Vial inventory with expiry and low-stock alerts • Optional Apple Health sync for weight & body-fat trends • Wellness journal and progress insights PepStack is an educational calculator. It is not medical advice and does not sell or supply any substance. Always consult a qualified professional. PepStack Pro is an auto-renewable subscription (monthly or annual). Payment is charged to your Apple ID; it auto-renews unless canceled at least 24 hours before the period ends. Manage or cancel in Settings. Pro unlocks unlimited protocols, dose logging, AI insights, and PDF export. Terms of Use (EULA): https://pepstack.co/terms Privacy Policy: https://pepstack.co/privacy

VialRhythm is a private, local-first schedule and record-keeping app for iPhone. Organize your own entries, see what is next, and keep a clear history without a required account. YOUR DAY AT A GLANCE See today’s schedule, mark an entry completed, skipped, or missed, and edit saved details whenever plans change. BUILT FOR IPHONE • Local notifications for schedules you create • Face ID or passcode app lock • Home Screen widget for the next saved entry • App Shortcuts for fast navigation and completion • Apple Calendar export • Native offline launch • Local JSON backup and restore MAKE IT YOURS Choose from Evergreen Ivory, Midnight Slate, and Coastal Sage themes. CUSTOM CYCLE TRACKING Add your own weeks-on and weeks-off cycle to daily, weekday, or interval schedules. Calendar indicators and entry badges make each phase visible. OFF weeks do not create doses, missed entries, or local reminders. VialRhythm does not recommend cycle lengths or protocols. PEPTIDE KNOWLEDGE Browse searchable, plain-language educational snapshots covering main body roles, approved uses, and popular research goals. Research entries are clearly labeled and the library does not provide buying, mixing, dosing, or treatment directions. TRANSPARENT ARITHMETIC The optional calculator shows every user-entered input, unit conversion, and formula. It does not recommend or verify a dose. VialRhythm is an informational, organizational, and arithmetic tool for research record-keeping purposes only. It does not provide medical advice, diagnosis, treatment, prescribing, dosage recommendations, or safety verification. Verify all information with a licensed physician or pharmacist.