DUO vs EnAPP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DUO
This multi-functional storage device offers a dual connector for seamless file transfer and management between Apple devices and computers. It allows for backing up contacts, streaming high-definition videos, and managing files directly from the device.
- Dual USB and Lightning connectors
- Contact backup and restore
- Independent music and video playback
- 1080p video streaming
- File management (copy, delete, export)
- Browse external and local files
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DUO-LINK 3 is a multi-functional storage device for Mac, PC, iPad, iPhone, and iPod touch. DUO-LINK 3 has a standard USB interface and a lightning connector for iPhone and iPad. Free up space on your iPhone and iPad. Transfer and share files between your iPhone, iPad & Mac or PC quickly and easily. DUO-LINK 3 Functions： ● Contact list backup and restore. ● Supports independent music and video playback. ● Stream 1080p videos directly from DUO-LINK 3. ● File management operations such as copy, delete, export etc. ● Browse files store on DUO-LINK 3 Drive. ● Browse local files stored within DUO-LINK 3 App. ● Transfer media and files from iPhone to DUO-LINK 3 Drive. Compatibility： ● IOS 9 and older versions. Compatible with : iPhone 6 Plus, iPad 4th Generation and older devices. ● PCs running Windows XP, Windows 7, and Windows 8. ● Mac computers running Mac OS 10.5 or later.
EnAPP
This mobile component is part of a comprehensive security solution based on zero-trust principles. It integrates terminal, application access, and data interaction security to create a unified platform. The solution aims to move beyond fragmented traditional network security models.
- Zero-trust security principles
- SDP architecture
- Unified terminal security
- Application access security
- Data interaction security
- Integrated security solution
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EnAPP是易安联EnSDP（零信任安界防护平台）的移动侧组件。 EnSDP是基于零信任理念，遵循SDP架构打造的融合统一终端安全、应用访问安全和数据交互安全等诸多安全技术和安全组件于一体的综合性安全解决方案。它打破了传统网安碎片化的边界防护模式，为组织信息安全转型保驾护航。
Screenshots
Verdict
The clearest difference is rating: EnAPP at 5.0 against DUO's 2.5. DUO's advantage is ratings volume (86 vs 1) and iOS requirement (8.0 vs 11.0). On price, update cadence, 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.
EnAPP holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: DUO has 86 ratings behind it against 1, so its average is the more settled of the two.
DUO ships an update every 3 months, EnAPP every 6 weeks. The most recent releases landed on October 28, 2026 and October 13, 2026 respectively.
| Parameter | DUO | EnAPP |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (86 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 14.5% of reviews | — |
| Number of ratings | 86 — better | 1 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 34 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Gopod Group Limited | 江苏易安联 |
Customer experience
DUO
EnAPP
Bugs and requests
DUO
Reported bugs
21 issues- App crashes when playing MP3 files
- App crashes when transferring large files
- App crashes when viewing videos
- App crashes when adjusting volume during video playback
- App crashes when copying photos
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- App crashes after 15-20 seconds of use
- Cannot recognize iPhone 8, iPhone X, iPhone 14, iPhone 16 Pro
- Hardware not detected despite proper connection
- Files show as transferred but remain on device
- Duplicate file errors during transfer
- File names corrupted with special characters
- Cannot delete files after transfer
- App closes when opening audio files
- Cannot access audio files after update
- App bloats to 1-2GB after initial use
- Incompatible with iOS 11 and later versions
- LED light not activating on connection
- Chinese language files appearing unexpectedly
- Cannot read flash drive after disconnect/reconnect
- File transfer progress not completing despite appearing to work
- Photos not visible in app despite being on device
Requested features
15 requests- Video thumbnail preview functionality
- File sharing with other applications
- Password/file locking capability
- Ability to select multiple files in view mode
- Wireless streaming to Apple TV
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- Root folder naming per device
- Ability to rename files on iPhone
- Create folders and organize files
- App storage on external drive
- Better PDF reader for stored files
- Fast forward/rewind for audio/video
- Playback resume from last location
- Bookmark functionality for media
- Live photo support
- Document transfer capability
EnAPP
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DUO
No in-app purchases
EnAPP
No in-app purchases
