# ReefSky vs Utrao

The clearest difference is review sentiment: ReefSky at 50% against Utrao's 0%. ReefSky also leads on update cadence (every 5 days vs every 2 months) and iOS requirement (9.0 vs 13). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ReefSky ships an update every 5 days, Utrao every 2 months. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ReefSky | Utrao |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/utrao/id6451104145/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 9 MB | 15 MB |
| Requires iOS | **9.0** | 13 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [勇强 夏](https://appshunter.io/developer/1043457850) | [Shanghai Utrao Bio-Engineering Co., Ltd.](https://appshunter.io/developer/1696567482) |

## What reviewers say

### ReefSky

[App page](https://appshunter.io/ios/app/reefsky/id1178881200)

This app controls aquarium LED lights via Bluetooth 4.0. It allows for custom, office, or home lighting modes with color transitions. The app also supports firmware updates.

**Highlights:** Bluetooth 4.0 control, 4-way LED lighting, Customizable lighting modes, Color transition effects, OAD firmware upgrades

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

**In-app purchases:** none


### Utrao

[App page](https://appshunter.io/ios/app/utrao/id6451104145)

This app allows users to control Internet of Things equipment for biological breeding. It aims to simplify the process of managing creature breeding with advanced technology.

**Highlights:** Control IoT equipment, Biological breeding technology, Manage creature breeding, Simplify breeding processes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReefSky free?

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

### Is Utrao free?

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

### Do ReefSky or Utrao have ads?

Neither ReefSky nor Utrao shows ads.

### Which is updated more often, ReefSky or Utrao?

ReefSky ships an update every 5 days, and Utrao every 2 months. Most recently, ReefSky was updated on October 18, 2026 and Utrao on October 24, 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.*