# DeTan vs Solay

The clearest difference is update cadence: Solay at every 6 days against DeTan's every 3 weeks. DeTan's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. DeTan sells 2 in-app purchases, starting at $3.89 per 7 days and Solay sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

DeTan ships an update every 3 weeks, Solay every 6 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | DeTan | Solay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/detan-sunburn-tracker/id6761007985/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 73 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Tatsat Brahmbhatt](https://appshunter.io/developer/1692901637) | [Kovacs Software Solutions](https://appshunter.io/developer/1366258691) |

## What reviewers say

### DeTan

[App page](https://appshunter.io/ios/app/detan-sunburn-tracker/id6761007985)

This app helps you manage sun exposure and tanning safely. It uses real-time UV data and your skin type to provide personalized guidance on when to seek shade, reapply sunscreen, and limit exposure. Track your daily sun intake and build healthier habits for better skin.

**Highlights:** Real-time UV index tracking, Smart tanning timer, Personalized skin protection, Sunscreen reminders, Daily exposure insights, Minimalist interface

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.89 | per 7 days |
| Yearly | $39.99 | per year |


### Solay

[App page](https://appshunter.io/ios/app/solay-uv-index/id6776711133)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $39.99 | per year |


## Frequently asked questions

### Is DeTan free?

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

### Is Solay free?

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

### Do DeTan or Solay have ads?

Neither DeTan nor Solay shows ads.

### Which is updated more often, DeTan or Solay?

DeTan ships an update every 3 weeks, and Solay every 6 days. Most recently, DeTan was updated on October 31, 2026 and Solay on October 31, 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.*