# NatureUP vs Sereni

The clearest difference is in-app purchases: NatureUP at none against Sereni's 1. NatureUP also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Sereni sells 1 one-off in-app purchase. NatureUP asks for nothing beyond the download.

NatureUP ships an update every 5 weeks, Sereni every 2 months. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | NatureUP | Sereni |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sereni-sleep-and-focus-sounds/id1663702621/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 57 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arcelik A.S.](https://appshunter.io/developer/492548829) | [michael ortiz](https://appshunter.io/developer/1663702623) |

## What reviewers say

### NatureUP

[App page](https://appshunter.io/ios/app/natureup/id1660747999)

**In-app purchases:** none


### Sereni

[App page](https://appshunter.io/ios/app/sereni-sleep-and-focus-sounds/id1663702621)

This app offers customizable white, pink, and brown noise sounds to aid focus, relaxation, or sleep. Its simple interface allows volume adjustment and timer settings for personalized ambient soundscapes.

**Highlights:** White, pink, and brown noise options, Customizable volume control, Adjustable timer settings, Simple and user-friendly interface, Minimalistic design

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sereni Plus | $1.99 | one-time |


## Frequently asked questions

### Is NatureUP free?

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

### Is Sereni free?

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

### Do NatureUP or Sereni have ads?

Sereni shows ads; NatureUP does not.

### Which is updated more often, NatureUP or Sereni?

NatureUP ships an update every 5 weeks, and Sereni every 2 months. Most recently, NatureUP was updated on October 25, 2026 and Sereni on October 26, 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.*