StackDay: Supplement Tracker
Track Your Daily Vitamin Stack
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Scan any supplement label with AI. Get personalized insights. Track your peptides, adaptogens, and full stack — and actually see what's working.
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 unlocks AI features, full correlation insights, detailed stats, unlimited history, and custom reminders. Free includes core tracking for your full stack.
Privacy Policy: https://foggy-labs.github.io/privacy/stackday
Terms of Use: https://foggy-labs.github.io/terms
Support: https://foggy-labs.github.io/support
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
StackDay is live.
Version 1.1 brings the complete supplement tracking toolkit to iOS:
— AI Label Scanner: photograph any supplement label and let AI do the parsing
— AI Supplement Advisor: chat with an AI that knows your exact stack
— AI Correlation Insights: see which supplements are actually moving the needle for you
— Cycling schedules for peptides and advanced protocols
— Smart Interaction Warnings: 16 known supplement conflicts and synergies flagged automatically
— Smart Timing Optimizer: one-tap conflict resolution
— 30-day adherence heatmap, streak tracking, and 18 achievements
— Research Hub with 55+ supplements and evidence ratings
— Apple Health integration, cost tracking, and home screen widget
Built by Foggy Labs. More coming soon.
The developer, Fog Hill, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Fog Hill, LLC
- Size
- 13.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Pro Annual Discount $0.99
- Pro Monthly Discount $0.99
- StackDay Pro Monthly Subscription $4.99
- StackDay Pro Annual Subscription $24.99
- Copyright
- © 2026 Foggy Labs, LLC