# Sunae vs Rainy Relax 4K

The clearest difference is price: Sunae at Free against Rainy Relax 4K's $0.99. Sunae also leads on in-app purchases (none vs 2). On update cadence, ads, device support and iOS requirement there is nothing between them.

Sunae is free to download; Rainy Relax 4K costs $0.99 up front. Rainy Relax 4K sells 2 in-app purchases, starting at $0.99 per month. Sunae asks for nothing beyond the download.

Sunae ships an update every 2 months, Rainy Relax 4K every 3 months. The most recent releases landed on November 7, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Sunae | Rainy Relax 4K |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 34 MB | 59 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Vincent Marc Braillard](https://appshunter.io/developer/1608234272) | [KISSAPP, S.L.](https://appshunter.io/developer/552812711) |

## What reviewers say

### Sunae

[App page](https://appshunter.io/ios/app/sunae/id1627885693)

**In-app purchases:** none


### Rainy Relax 4K

[App page](https://appshunter.io/ios/app/rainy-relax-4k/id6737191959)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rainy Relax Full Version | $0.99 | per month |
| Rainy Relax Full Version | $9.99 | per year |


## Frequently asked questions

### Is Sunae free?

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

### Is Rainy Relax 4K free?

Rainy Relax 4K costs $0.99, and also offers in-app purchases.

### Do Sunae or Rainy Relax 4K have ads?

Neither Sunae nor Rainy Relax 4K shows ads.

### Which is updated more often, Sunae or Rainy Relax 4K?

Sunae ships an update every 2 months, and Rainy Relax 4K every 3 months. Most recently, Sunae was updated on November 7, 2026 and Rainy Relax 4K on November 12, 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.*