# Rays: Auto Vitamin D Tracking > Personalize your vitamin D: auto sun tracking, UV & smart recommendations. Canonical page: [https://chrome-stats.com/d/com.getrays.rayspublic](https://chrome-stats.com/d/com.getrays.rayspublic) ## Overview - **ID:** `com.getrays.rayspublic` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Rays Health Technologies LLC - **Category:** HEALTH\_AND\_FITNESS - **Downloads:** 71 - **Version:** 1.45 - **Last updated:** 2026-08-26 - **First published:** 2026-04-28 - **Publisher country:** US - **Size:** 91 MB - **Data as of:** 2026-09-15 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.getrays.rayspublic) - **Website:** [https://getrays.app](https://getrays.app/) - **Privacy policy:** [https://getrays.app/privacy](https://getrays.app/privacy) ## Description Track Your Vitamin D Naturally
Vitamin D deficiency affects over 1 billion people worldwide, but monitoring your sun exposure shouldn't be complicated. Rays automatically tracks your vitamin D synthesis in the background, eliminating the need for manual logging.

Why Vitamin D Matters
Optimal vitamin D levels support natural energy, balanced mood, healthy sleep cycles, and radiant skin. With Rays' precise tracking, you can maintain these benefits year-round without guesswork or overdoing it.

Automatic Vitamin D Tracking
Rays uses an outdoor detection system combining GPS precision patterns, sensor data, movement analysis, and personalized machine learning that adapts to your routines. With high accuracy and minimal battery usage, it works seamlessly in the background without any manual input.

Personalized Health Intelligence
Our algorithm analyzes your skin type (Fitzpatrick Scale I-VI), age, geographic location, supplement intake, and lifestyle factors. Based on Endocrine Society Clinical Practice Guidelines, we provide recommendations as precise as your doctor's, but as convenient as checking the weather.

Smart Recommendations
Receive personalized guidance like "Get 18 minutes at 11 AM tomorrow" based on real-time UV index, cloud cover, solar positioning, and your personal synthesis rate. Our intelligent engine suggests optimal timing when UV will be 2-3x more efficient for vitamin D production.

Advanced Progress Tracking
Monitor your vitamin D synthesis with detailed weekly charts, streak tracking, and comprehensive health insights. Seamlessly syncs with Apple Health and automatically adjusts for seasonal variations while preventing excessive intake when combined with supplements.
Rays is perfect for health-conscious individuals who want optimal vitamin D without the guesswork.

Try Rays with full access to all features.
Terms of Use: https://getrays.app/eula
Privacy Policy: https://getrays.app/privacy
Health Disclaimer: https://getrays.app/health-disclaimer ## Rankings - #2,127,466 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_BACKGROUND_LOCATION` - `android.permission.ACCESS_COARSE_LOCATION` - `android.permission.ACCESS_FINE_LOCATION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.ACCESS_WIFI_STATE` - `android.permission.ACTIVITY_RECOGNITION` - `android.permission.CHANGE_WIFI_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.FOREGROUND_SERVICE_LOCATION` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.READ_APP_BADGE` - `android.permission.READ_EXTERNAL_STORAGE` - `android.permission.READ_MEDIA_AUDIO` - `android.permission.READ_MEDIA_VISUAL_USER_SELECTED` - `android.permission.RECEIVE_BOOT_COMPLETED` - `android.permission.SCHEDULE_EXACT_ALARM` - `android.permission.SYSTEM_ALERT_WINDOW` - `android.permission.USE_BIOMETRIC` - `android.permission.USE_FINGERPRINT` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `android.permission.WRITE_EXTERNAL_STORAGE` - `com.anddoes.launcher.permission.UPDATE_COUNT` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.getrays.rayspublic.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.htc.launcher.permission.READ_SETTINGS` - `com.htc.launcher.permission.UPDATE_SHORTCUT` - `com.huawei.android.launcher.permission.CHANGE_BADGE` - `com.huawei.android.launcher.permission.READ_SETTINGS` - `com.huawei.android.launcher.permission.WRITE_SETTINGS` - `com.majeur.launcher.permission.UPDATE_BADGE` - `com.oppo.launcher.permission.READ_SETTINGS` - `com.oppo.launcher.permission.WRITE_SETTINGS` - `com.sec.android.provider.badge.permission.READ` - `com.sec.android.provider.badge.permission.WRITE` - `com.sonyericsson.home.permission.BROADCAST_BADGE` - `com.sonymobile.home.permission.PROVIDER_INSERT_BADGE` - `me.everything.badger.permission.BADGE_COUNT_READ` - `me.everything.badger.permission.BADGE_COUNT_WRITE` ## Similar extensions and apps - [Vitamin D Tracker](https://chrome-stats.com/d/at.persie0.vitamindtracker) — 1,659 users - [Daily D – Vitamin D Tracker](https://chrome-stats.com/d/com.unmm.dailyd) — 27 users - [Sunshine - Vitamin D tracker](https://chrome-stats.com/d/com.axelhunter.sunshine) — 11 users - [DTracker - Vitamin D Tracker](https://chrome-stats.com/d/im.dtracker.vitamind.tracker.deminder) — 954 users - [SunDTracker: Vitamin D & UV](https://chrome-stats.com/d/com.sromline.sundtracker) — 240 users - [Vitamin D Tracker & UV Index](https://chrome-stats.com/d/com.uv.vitamindtracker) — 9,407 users, 3.68 / 5 - [Hello Sun - Vitamin D Tracker](https://chrome-stats.com/d/com.brammermedia.hellosun) — 137 users - [Sunlyytics](https://chrome-stats.com/d/com.initarobah.sunlyytics) — 56 users - [Sun Tracker: UV & Vitamin D](https://chrome-stats.com/d/sunbath.systemsbase.suntracker) — 85 users - [RaayBalance](https://chrome-stats.com/d/com.kejaz) — 18 users - [Sun-Day](https://chrome-stats.com/d/com.sunday.uvtracker) — 600 users - [Rayoryy](https://chrome-stats.com/d/com.dsxweb.rayoryy) — 1 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.getrays.rayspublic)