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D-Fine — Vitamin D Tracker App for iPhone & Apple Watch — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Nutrition →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
vitaminduvtracker.com ↗	71 match 1 shared topics	Vitamin D UV Tracker \| Know Your Sun. Track Your Vitamin D.	en	nutrition	robotsllmsaihumans	emailphone	none
0xcal.app ↗	70 match 1 shared topics	0xCal \| AI Calorie & Macro Tracker for iPhone	en	nutrition	robots llmsaihumans	emailphone	none
howlonginthesun.com ↗	70 match 1 shared topics	How Long In The Sun? — Your Vitamin D Location Report	en	nutrition	robotsllmsaihumans	emailphone	none
vitamindcalculator.com ↗	68 match 1 shared topics	Vitamin D Calculator — Personalised Sun Exposure Estimator	en	nutrition	robotsllmsaihumans	emailphone	none
vivfuel.com ↗	67 match 1 shared topics	VivFuel — Nutrition & Supplement Tracker	en	nutrition	robotsllmsaihumans	emailphone	none
vitamynai.com ↗	67 match 1 shared topics	Vit AI — AI Nutrition Tracker: Track Vitamins & Calories from a Photo	en	nutrition	robotsllmsaihumans	emailphone	none
vitamindshirts.com ↗	67 match 1 shared topics	VItamin D Shirts – vitaminDshirts	en	nutrition Shopify	robots llmsaihumans	emailphone	none
vitamindcookies.com ↗	67 match 1 shared topics	Home - Vitamin D Cookies	en	nutrition WordPress	robots llmsaihumans	emailphone	none
hellocalories.com ↗	66 match 1 shared topics	HelloCalorie — AI-Powered Calorie & Macro Tracker	en	nutrition	robotsllmsaihumans	emailphone	none
mealjot.com ↗	66 match 1 shared topics	Mealjot Food Tracker	en	nutrition	robotsllmsaihumans	emailphone	none
mealsnapshotai.com ↗	66 match 1 shared topics	AI Nutrition Tracker and Calorie Counter App	en	nutrition	robots llmsaihumans	emailphone	none
brocalorie.com ↗	66 match 1 shared topics	Brocalorie — AI Calorie Tracker for Simple, Smart Nutrition	en	nutrition Webflow	robotsllmsaihumans	emailphone	none
daction.org ↗	66 match 1 shared topics	D*action - Vitamin D Testing & Research Study	United States~ en	nutrition	robotsllmsaihumans	emailphone	none
mealo.ai ↗	66 match 1 shared topics	Mealo — The Simplest AI Tracker	en	nutrition	robotsllmsaihumans	emailphone	none
kcalzen.com ↗	66 match 1 shared topics	KcalZen - Privacy-First Calorie Tracker for Nutritionists	en	nutrition	robotsllmsaihumans	emailphone	none
mealmerit.com ↗	66 match 1 shared topics	MealMerit — Complete DV% Nutrition Tracker	en	nutrition	robotsllmsaihumans	emailphone	none
keluargaipi.com ↗	65 match 1 shared topics	IPI Vitamin & Mineral	en	nutrition	robotsllmsaihumans	emailphone	none
meal4me.app ↗	65 match 1 shared topics	Meal4Me — AI Meal Planner, Fasting Timer & Step Tracker	en	nutrition	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.