# Black Mat vs Vitamin D Sun Tracker

The clearest difference is in-app purchases: Black Mat at none against Vitamin D Sun Tracker's 4. Vitamin D Sun Tracker's advantage is update cadence (weekly vs every 6 weeks). On price, ads, device support and iOS requirement 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. Black Mat asks for nothing beyond the download.

Black Mat ships an update every 6 weeks, Vitamin D Sun Tracker weekly. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Black Mat | Vitamin D Sun Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (30 ratings)](https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235/reviews)** |
| Number of ratings | — | **30** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | — | Freemium |
| Size | 58 MB | 42 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Momence, Inc.](https://appshunter.io/developer/1577856011) | [Greycloud LLC](https://appshunter.io/developer/1767904895) |

## What reviewers say

### Black Mat

[App page](https://appshunter.io/ios/app/black-mat/id6503368681)

**Features:** macOS Compatibility, Apple Wallet, 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 Black Mat free?

Black Mat 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.

### Do Black Mat or Vitamin D Sun Tracker have ads?

Neither Black Mat nor Vitamin D Sun Tracker shows ads.

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

Black Mat ships an update every 6 weeks, and Vitamin D Sun Tracker weekly. Most recently, Black Mat was updated on October 30, 2026 and Vitamin D Sun Tracker on November 9, 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.*