UGREEN NAS vs Sierro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UGREEN NAS
Manage your personal data across devices with this application for a UGOS Pro system. It offers comprehensive control over user access, hardware, network, and file services. Organize and access your files, photos, and media libraries efficiently with advanced features and security.
- User and access permission management
- Hardware and network configuration
- Multiple storage modes (RAID, JBOD)
- Intelligent file filtering and sharing
- Photo and video album creation
- Automated media library poster walls
- Integrated virus scanning
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UGREEN NAS - an efficient application designed for UGOS Pro system management. It empowers you to manage your personal data seamlessly across all your devices and thus enjoy a smarter, more personalized experience. 【Control Panel】 • User Management: Assign access permissions flexibly. • Hardware & Power: Configure buzzer, fan, and hard drive sleep modes, etc. • Network: Set up internal/external network connections and web server configurations. • File Service: Configure file protocols, including SMB, FTP, NFS, etc. • Update & Restore: Online update system and restore configuration. 【Storage】 • Supports multiple storage modes: Basic, JBOD, and RAID modes. • Visual monitoring of hard drives, volumes, and SSD caches. • Online capacity expansion with Hot Spare support for enhanced security and speed. • Intelligent monitoring of hard drive status and storage capacity. 【App Center】 • Filter by usage scenarios and download desired applications. • Supports offline manual installation. 【Files】 • Intelligent filter, search, and file categorization features. • One-click file sharing. Supports accessing contents in sharing links without login. • Supports adjusting user access permissions for shared folders. • Supports accessing via multiple protocols (e.g.: SMB, FTP, and WebDAV). 【Photos】 • View your photos and videos in timeline view and custom your personal people album. • Custom conditions to create albums to manage cherished moments. • Display sources and detailed information of photos and videos. 【Theater】 • Automatically generate elaborate poster walls and build your personal library. • Supports filtering by film names, actors, etc. • Match film information accurately. • Automatically categorize series films for a seamless experience. 【Security】 • Integrated ClamAV engine for full virus scanning. • Supports scheduled scan and real-time protection for data security.
Sierro
Monitor and manage your home energy storage system. View battery status, solar generation, and power flow. Receive alerts for power outages and low battery levels to stay informed.
- Monitor battery status
- View solar generation
- Track power flow
- Receive device alerts
- Get outage notifications
- Low battery alerts
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Sierro Energy helps you monitor and manage your Sierro home energy storage system. View battery status, solar generation, power flow, and device alerts in one place. Get notifications for power outages and low battery so you can stay informed even when the app is in the background.
Screenshots
Verdict
The clearest difference is rating: UGREEN NAS at 4.1 against Sierro's 2.3. UGREEN NAS also leads on ratings volume (315 vs 3). Sierro's advantage is update cadence (every 10 days vs monthly). On price, review sentiment, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
UGREEN NAS holds the better App Store score, 4.1 against 2.3. That said, the two scores are not equally well evidenced: UGREEN NAS has 315 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 53% of UGREEN NAS's written reviews are positive against 50% of Sierro's.
UGREEN NAS ships an update monthly, Sierro every 10 days. Both last shipped on October 24, 2026.
| Parameter | UGREEN NAS | Sierro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (315 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 53.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 315 — better | 3 |
| Update frequency | Monthly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Apple TV — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 725 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | 深圳市绿联科技股份有限公司 | Sierro Intelligent Technology Co., Ltd |
Customer experience
UGREEN NAS
Sierro
Bugs and requests
UGREEN NAS
Reported bugs
5 issues- 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
5 requests- 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
Sierro
Not enough reviews yet to summarise bugs or requests.
In-app purchases
UGREEN NAS
No in-app purchases
Sierro
No in-app purchases
