# UGREEN NAS vs AIRSTEP Cortex

The clearest difference is update cadence: UGREEN NAS at every 3 weeks against AIRSTEP Cortex's every 2 months. AIRSTEP Cortex's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

UGREEN NAS ships an update every 3 weeks, AIRSTEP Cortex every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | UGREEN NAS | AIRSTEP Cortex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (315 ratings)](https://appshunter.io/ios/app/ugreen-nas/id6458647408/reviews)** | — |
| Number of ratings | **315** | — |
| Positive reviews | 53.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 782 MB | 22 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市绿联科技股份有限公司](https://appshunter.io/developer/1489890545) | [XSONIC Inc.](https://appshunter.io/developer/1487765084) |

## What reviewers say

### UGREEN NAS

[App page](https://appshunter.io/ios/app/ugreen-nas/id6458647408)

Manage personal data across devices with this application for a UGOS Pro system. It offers robust control over users, hardware, network, and file services, alongside flexible storage options and an app center for enhanced functionality.

**Highlights:** User and access permission management, Hardware and network configuration, Multiple storage modes (RAID, JBOD), Intelligent file filtering and sharing, Timeline photo and video viewing, Automated movie poster generation, Virus scanning and real-time protection

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast and responsive
- 💡 Frequent updates and improvements
- 🔒 Secure remote access
- 🔥 Great value for money

**What reviewers complain about**

- 🐛 Connectivity issues
- 🔋 Battery drain problems
- 🤔 Unintuitive user interface
- 🌐 Limited language support
- 🔍 Lacking advanced features

**Reported bugs**

- Crashes when uploading large files
- Sync issues causing data loss
- Remote access not working as expected
- Incompatibility with certain devices/OSes
- Media player bugs (audio/video desync, choppy playback)

**Requested features**

- Dedicated photo/video viewer app for Apple TV
- Ability to edit metadata for media files
- Integration with Files app for seamless storage
- Dark mode option
- Improved media playback performance


### AIRSTEP Cortex

[App page](https://appshunter.io/ios/app/airstep-cortex/id6754727002)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is UGREEN NAS free?

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

### Is AIRSTEP Cortex free?

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

### Do UGREEN NAS or AIRSTEP Cortex have ads?

Neither UGREEN NAS nor AIRSTEP Cortex shows ads.

### Which is updated more often, UGREEN NAS or AIRSTEP Cortex?

UGREEN NAS ships an update every 3 weeks, and AIRSTEP Cortex every 2 months. Most recently, UGREEN NAS was updated on November 4, 2026 and AIRSTEP Cortex on October 30, 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.*