# Sun Day Tracker vs Treatar

The clearest difference is update cadence: Treatar at daily against Sun Day Tracker's monthly. Treatar also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

Sun Day Tracker ships an update monthly, Treatar daily. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Sun Day Tracker | Treatar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (28 ratings)](https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free | — |
| Size | 1 MB | 36 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [permissionless tech, llc](https://appshunter.io/developer/1824145893) | [Distyla LLC](https://appshunter.io/developer/1774464951) |

## 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


### Treatar

[App page](https://appshunter.io/ios/app/treatar/id6754490140)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sun Day Tracker free?

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

### Is Treatar free?

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

### Do Sun Day Tracker or Treatar have ads?

Neither Sun Day Tracker nor Treatar shows ads.

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

Sun Day Tracker ships an update monthly, and Treatar daily. Most recently, Sun Day Tracker was updated on October 21, 2026 and Treatar on October 8, 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.*