Marrow: Calcium Tracker
Bone Health & Vitamin D Log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Hit 1,000 mg of calcium every day. Log foods, track sun exposure, and watch your bone health improve — all offline, no account needed.
Most people fall short of the 1,000 mg daily calcium goal without realizing it. Marrow makes it effortless to close that gap — log what you eat, track sun exposure for vitamin D, and see your progress at a glance.
— KEY FEATURES —
• Daily calcium progress bar — live mg counter tracks your intake toward the 1,000 mg goal, turning green the moment you hit it
• Sun exposure log — tap +/- to record minutes of sun each day to support natural vitamin D synthesis
• 30 curated calcium-rich foods — dairy, leafy greens, fish, nuts, seeds, and plant-based options, each with exact mg per serving
• Category filters and search — quickly find any food by category (Dairy, Leafy Greens, Fish, Nuts, Plant-Based) or by name
• Foods sorted by calcium content — highest-impact choices always surface first
• Log and remove meals — add a food in two taps; remove it just as easily if you log by mistake
• 14-day history chart — color-coded bar chart shows daily totals at a glance, with a goal reference line
• Summary stats — see your average daily calcium and how many of the last 14 days you hit the goal
• Per-day breakdown — tap into any past day to see every food logged and sun minutes recorded
• Fully offline and private — no account, no data leaves your device
Whether you are preventing osteoporosis, recovering bone density, or simply building better eating habits, Marrow gives you an accurate, distraction-free way to take control of your bone health.
This app is for informational and tracking purposes only and is not a substitute for medical advice. Consult a qualified healthcare professional before changing your diet or health plan.
— Marrow Bone Health PREMIUM —
Premium unlocks unlimited food and sun logging, the full 14-day history chart with goal trends, a personalized daily calcium target, and an ad-free experience — everything stored 100% offline on your device.
Subscription options:
• Weekly — $9.99 / week
• Yearly — $49.99 / year (includes a 3-day free trial)
Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the period. Manage or cancel anytime in your Apple Account settings.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://pnkl26.web.app/privacy-policy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.0
• Daily calcium intake tracker with live progress bar toward the 1,000 mg goal
• Sun exposure log (minutes) for vitamin D tracking
• Library of 30 calcium-rich foods with exact mg per serving across 5 categories
• Category filters and search to find foods fast
• Log and remove individual food entries throughout the day
• 14-day history bar chart, color-coded by goal met vs. below goal
• Average daily calcium and goal-days summary stats
• Fully offline — no account or internet connection required
The developer, Linh Phan Nhat Khanh, 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
- Linh Phan Nhat Khanh
- Size
- 789.5 KB
- 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
4+
- 4+
- In-App Purchases
Yes
- Marrow Bone Health Weekly $9.99
- Marrow Bone Health Yearly $49.99
- Copyright
- © 2026 PNKL