# Sun Day Tracker vs Frelax

The clearest difference is in-app purchases: Sun Day Tracker at none against Frelax's 2. Sun Day Tracker also leads on ads (none vs shown). Frelax's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price and update cadence there is nothing between them.

Both are free to download. Frelax sells 2 in-app purchases, starting at $4.99 per month. Sun Day Tracker asks for nothing beyond the download.

Sun Day Tracker ships an update monthly, Frelax every 5 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sun Day Tracker | Frelax |
| --- | --- | --- |
| 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** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free | — |
| Size | 1 MB | 62 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [permissionless tech, llc](https://appshunter.io/developer/1824145893) | [HALIL IBRAHIM BERK](https://appshunter.io/developer/1850416601) |

## 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


### Frelax

[App page](https://appshunter.io/ios/app/frelax/id6754838142)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $34.99 | per year |


## Frequently asked questions

### Is Sun Day Tracker free?

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

### Is Frelax free?

Frelax is free to download, with in-app purchases available.

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

Frelax shows ads; Sun Day Tracker does not.

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

Sun Day Tracker ships an update monthly, and Frelax every 5 weeks. Most recently, Sun Day Tracker was updated on October 21, 2026 and Frelax 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.*