# Sun Day Tracker vs Vitamin D Sun Tracker

The clearest difference is in-app purchases: Sun Day Tracker at none against Vitamin D Sun Tracker's 4. Vitamin D Sun Tracker's advantage is update cadence (weekly vs monthly) and review sentiment (100% vs 83%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Vitamin D Sun Tracker sells 4 in-app purchases, starting at $4.99 per month. Sun Day Tracker asks for nothing beyond the download.

Vitamin D Sun Tracker holds the better App Store score, 4.7 against 4.6. Both are backed by a comparable volume of ratings — 28 and 26 respectively. Written reviews point the same way: 83% of Sun Day Tracker's written reviews are positive against 100% of Vitamin D Sun Tracker's.

Sun Day Tracker ships an update monthly, Vitamin D Sun Tracker weekly. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sun Day Tracker | Vitamin D Sun Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (28 ratings)](https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews) | **[4.7 (26 ratings)](https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235/reviews)** |
| Number of ratings | **28** | 26 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 1 MB | 42 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [permissionless tech, llc](https://appshunter.io/developer/1824145893) | [Greycloud LLC](https://appshunter.io/developer/1767904895) |

## What reviewers say

### Sun Day Tracker

[App page](https://appshunter.io/ios/app/sun-day-tracker/id6748545544)

Monitor your daily vitamin D absorption from sunlight exposure. This straightforward application helps you keep track of your sun-related vitamin D intake.

**Highlights:** Track daily vitamin D intake, Sunlight exposure monitoring, Simple interface, Daily tracking

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

**In-app purchases:** none


### Vitamin D Sun Tracker

[App page](https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235)

This app estimates your Vitamin D intake from sun exposure and supplements. It provides real-time UV index, weather, and personalized guidance on optimal sun times and duration to prevent sunburn. Track your progress with historical data and insights.

**Highlights:** Real-time Vitamin D estimates, Live UV Index and weather integration, Personalized sun timer with sunburn guidance, 48-hour UV forecast for optimal exposure, Supplement and cofactor tracking, Historical data and trend analysis, Optional Apple Health integration

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $24.99 | per year |
| Yearly | $29.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Sun Day Tracker free?

Sun Day Tracker is free to download, with no in-app purchases.

### Is Vitamin D Sun Tracker free?

Vitamin D Sun Tracker is free to download, with in-app purchases available.

### Which has better reviews, Sun Day Tracker or Vitamin D Sun Tracker?

Vitamin D Sun Tracker is rated higher. Sun Day Tracker averages 4.6 out of 5 from 28 ratings, while Vitamin D Sun Tracker averages 4.7 from 26 ratings.

### Do Sun Day Tracker or Vitamin D Sun Tracker have ads?

Neither Sun Day Tracker nor Vitamin D Sun Tracker shows ads.

### Which is updated more often, Sun Day Tracker or Vitamin D Sun Tracker?

Sun Day Tracker ships an update monthly, and Vitamin D Sun Tracker weekly. Most recently, Sun Day Tracker was updated on October 21, 2026 and Vitamin D Sun Tracker on October 25, 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.*