StackDay: Supplement Tracker

Your supplement stack deserves better than a spreadsheet.

StackDay is the complete supplement tracking toolkit — built for people who take their stack seriously. Whether you're cycling peptides, running a longevity protocol, or just trying to remember if you took your magnesium, StackDay keeps you consistent, informed, and in control.

AI LABEL SCANNER
Point your camera at any supplement label. StackDay's AI reads the ingredients, parses the details, and adds everything to your stack automatically. No manual entry. Works on any brand, any format — including peptides with complex compound names.

AI SUPPLEMENT ADVISOR
Chat directly with an AI that knows your exact stack. Ask it anything: "What should I take for better sleep?" or "Are any of my supplements conflicting?" It gives you personalized answers based on what you're already taking — not generic advice.

AI CORRELATION INSIGHTS
StackDay compares how you feel on days you took each supplement versus days you didn't. See results like "Your energy is 23% higher on days you take Creatine." Real data from your own body, not anecdotes.

PEPTIDE & ADVANCED PROTOCOL SUPPORT
StackDay supports cycling schedules built for peptides and advanced stacks — N days on, M days off, specific day patterns, weekday-only, and more. Pill count tracking with low-supply warnings keeps you ahead of your reorder.

INTERACTION INTELLIGENCE
16 known supplement interactions flagged automatically — warnings and synergies. The Smart Timing Optimizer detects conflicts in your stack and suggests fixes with a single tap. Know that calcium and iron shouldn't share a time slot before it costs you results.

STREAK & ADHERENCE TRACKING
Daily check-offs, a 30-day heatmap, weekly summaries, and a full achievement system (18 badges) keep you consistent. Adherence calculations automatically respect your cycling and scheduling patterns.

RESEARCH HUB
55+ supplements with evidence levels (Strong, Moderate, Emerging, Preliminary), mechanism of action, benefits, and dosing guidance. Eight curated community stacks — Longevity, Athletic Performance, Sleep, Brain & Focus, and more — ready to add in one tap.

MORE IN STACKDAY
• Apple Health integration (sleep, steps, workouts)
• Supplement cost tracker — daily, monthly, yearly spend
• Per-supplement reminders
• Home screen widget
• Import/export your stack as JSON

StackDay Pro