# Vitamin D Window Widget vs Seize Light

The clearest difference is ads: Vitamin D Window Widget at none against Seize Light's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Vitamin D Window Widget | Seize Light |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/vitamin-d-window-widget/id6759223422/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 2 MB | 35 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Airhopping, SL](https://appshunter.io/developer/1339572434) | [sebastian totte](https://appshunter.io/developer/1819107580) |

## What reviewers say

### Vitamin D Window Widget

[App page](https://appshunter.io/ios/app/vitamin-d-window-widget/id6759223422)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Seize Light

[App page](https://appshunter.io/ios/app/seize-light/id6784576883)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Vitamin D Window Widget free?

Vitamin D Window Widget is free to download, with no in-app purchases.

### Is Seize Light free?

Seize Light is free to download, with no in-app purchases.

### Do Vitamin D Window Widget or Seize Light have ads?

Seize Light shows ads; Vitamin D Window Widget does not.

### Which is updated more often, Vitamin D Window Widget or Seize Light?

Vitamin D Window Widget ships an update every 2 weeks, and Seize Light every 2 weeks. Most recently, Vitamin D Window Widget was updated on October 10, 2026 and Seize Light on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*