YASEE vs Vitamin D Window Widget
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YASEE
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This application is equipped with blood glucose and blood pressure monitoring devices, which have received official regulatory approvals from the U.S. FDA and EU CE. The application is exclusively available for use in countries and regions that have obtained regulatory clearance. This application provides users with manual entry and management services for personal health data, enabling them to record, view, and organize their health-related information autonomously. It facilitates daily health status tracking and management, with all data filled in manually by users. The operation is simple and convenient, helping users better monitor their personal health trends. 【Disclaimer】 In order to allow you to obtain rich medical science popularization information resources, YASEE will show you the information pages provided by third parties for you, and the responsibilities of relevant services are all borne by the third party to you. YASEE cannot make promises about it and does not assume any responsibility. At the same time, the viewpoints in the medical science popularization information resources should not be regarded as any diagnosis and treatment services and suggestions, and cannot replace the clinical diagnosis of doctors; you cannot diagnose and treat diseases solely by relying on or according to the viewpoints in the medical and health information resources. At the same time, in view of the technical complexity, rapid update and iteration, individual specificity, etc. of medicine, it is not excluded that there are omissions, errors, ambiguities, etc. in the viewpoints in the medical science popularization information resources. Please refer to them with caution. YASEE does not make any recommendations on medication and treatment methods. If treatment is needed, it is still necessary to follow the doctor's advice. If there are any adverse consequences caused by not following the doctor's advice, YASEE does not bear any responsibility.Disclaimer: This app is for reference and general wellness use only. It is not intended to be a medical device, nor is it designed for medical diagnosis, treatment, or health monitoring. Always seek the advice of a qualified physician with any questions regarding medical conditions. Do not disregard professional medical advice or delay seeking it because of information you have obtained from this app.
Vitamin D Window Widget
This app displays the optimal times of day for natural vitamin D production based on your location and the sun's elevation. It offers real-time sun schedules, smart widgets for home screen access, and notifications to help you maximize your sun exposure.
- Real-time sun schedule
- Smart widgets
- Daily schedule updates
- Dynamic Island countdown
- Location-based calculations
- Offline functionality
- Solar-themed design
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Vitamin D Window shows you the exact hours when sunlight is strong enough for natural vitamin D production at your location. Set up the app and the widget and enjoy the time window in a snapshot. HOW IT WORKS The app calculates solar elevation angles throughout the day using your GPS coordinates. When the sun is high enough above the horizon (above 45° for optimal conditions, above 30° for partial), you get a clear vitamin D time window with start and end times. FEATURES · Real-time sun schedule — sunrise, sunset, and vitamin D hours at a glance · Solar progress bar — see where you are in the day's sun cycle · Smart widgets (small, medium, large) — check your vitamin D window right from your home screen · Daily schedule — it changes depending on the time of the year · Dynamic island with live countdown of the last minutes of vitamin D in the day · Notifications — don't lose the key moments of the day · Location-based — it changes depending on your location · Works offline — no internet connection required after setup · Beautiful solar-themed design — adaptive gradients that follow the sun through the day WIDGETS THAT KEEP YOU INFORMED Add a widget to your home screen and instantly see today's vitamin D window. The small widget features a progress bar in real time as you move through the vitamin D hours. Medium and large widgets show the full sun timeline with sunrise, sunset, and vitamin D periods. After sunset, widgets automatically switch to show tomorrow's schedule — so you always know what's coming. WHO IS THIS FOR? · Health-conscious individuals who want to optimize their sun exposure timing · People living at higher latitudes where vitamin D windows are seasonal (almost all countries) · Outdoor enthusiasts planning activities around peak sun hours · Anyone curious about their local solar schedule PRIVACY FIRST Your location is used only on your device to calculate solar positions. No data is collected, stored on servers, or shared with third parties. Everything runs locally. — Solar calculations powered by the SunCalc algorithm. Vitamin D window times are based on solar elevation angles and may vary depending on individual factors such as skin type, altitude, and atmospheric conditions.
Screenshots
Verdict
The clearest difference is update cadence: Vitamin D Window Widget at every 2 weeks against YASEE's monthly. YASEE's advantage is iOS requirement (13.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
YASEE ships an update monthly, Vitamin D Window Widget every 2 weeks. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | YASEE | Vitamin D Window Widget |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 51 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | YASEE Biomedical Inc. | Airhopping, SL |
In-app purchases
YASEE
No in-app purchases
Vitamin D Window Widget
No in-app purchases









