Comparison

Vitamin D Window Widget vs SunVitD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time sun schedule
  • Smart widgets
  • Daily schedule updates
  • Dynamic Island countdown
  • Location-based calculations
  • Offline functionality
  • Solar-themed design
Features
Read full description

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.

About

SunVitD

Read full description

SunVitD helps you plan outdoor time using UV, weather, air quality, and personal sun-profile inputs. It provides educational sun-exposure estimates and practical planning context so you can make more informed everyday choices. Features include: • UV-aware outdoor planning • Educational sun-exposure estimates • Weather and air quality context • 7-day forecast planning • Skin type, age, SPF, and body exposure inputs • Saved readings and history with SunVitD Pro • Reminders with SunVitD Pro • Limited preview access before subscribing • SunVitD Pro Monthly subscription, with a 7-day free trial for eligible users SunVitD is designed for general wellness and educational planning. It does not diagnose, treat, cure, or prevent any medical condition. It does not prescribe supplements, medical dosage, or guaranteed safe sun exposure. UV conditions can change quickly, and individual needs vary. For medical advice, vitamin D deficiency concerns, skin cancer risk, photosensitivity, or supplement guidance, consult a qualified healthcare professional. SunVitD Pro subscription: SunVitD Pro Monthly is an auto-renewable monthly subscription that unlocks full live UV and forecast planning, saved history, reminders, and the complete app experience. A 7-day free trial may be available for eligible users. After the trial, the subscription renews monthly unless canceled at least 24 hours before the end of the current period. You can manage or cancel subscriptions in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Vitamin D Window Widget4 screens
SunVitD4 screens

Verdict

The call

The clearest difference is in-app purchases: Vitamin D Window Widget at none against SunVitD's 1. On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SunVitD sells 1 in-app purchase, starting at $3.99 per month. Vitamin D Window Widget asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Vitamin D Window Widget versus SunVitD: the parameters behind the verdict, then further details
ParameterVitamin D Window WidgetSunVitD
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeks—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS18.017.0 — better
Further details — not scored
Size2 MB3 MB
Age rating4+4+
DeveloperAirhopping, SLAWMB Sp. z o.o.

In-app purchases

None

Vitamin D Window Widget

No in-app purchases

1 purchases

SunVitD

Subscriptions1
  • SunVitD Pro Monthly7 Days trial$3.991 Month

Questions

Is Vitamin D Window Widget free?
Vitamin D Window Widget is free to download, with no in-app purchases.
Is SunVitD free?
SunVitD is free to download, with in-app purchases available.
Do Vitamin D Window Widget or SunVitD have ads?
Neither Vitamin D Window Widget nor SunVitD shows ads.

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