| Name | Metalio E-Ink 4 | Xteink X3 |
|---|---|---|
| Image |  |
 |
| MSRP | ~$90 | $79 |
| Released | 2026 | 2026 |
| Availability | Available | Available |
| Check price: | AliExpress | Xteink, Amazon |
| Display specifications | ||
| Display type | E Ink | E Ink |
| Display size (inch) | 3.97 | 3.7 |
| Resolution (pixels W×H) | 400×800 | 528×792 |
| Color display? | No | No |
| Pixel density | 235 PPI | 250+ PPI |
| Screen light? | No | No |
| Adjust color temperature? | NA | NA |
| Auto-rotate? | ? | ❌ (gyro for page turns) |
| Input options & features | ||
| Touchscreen | ✔ | ❌ |
| Button controls? | ✔ Page-turn, AI button, menu | ✔ Page-turn (2×), Back, OK |
| Stylus input | ❌ | ❌ |
| Dark mode | ? | ✔ |
| Audiobooks | ? | ❌ |
| Connectivity | ||
| Bluetooth | ? | ✔ |
| Wi-Fi? | Wi-Fi | Wi-Fi 4 |
| Cellular network | ✔ 4G via SIM (optional, +~$20) | ❌ |
| Software | ||
| Operating system | Custom OS + companion app | Custom OS |
| Reading apps & e-book shops | TXT/EPUB reader | TXT/EPUB reader |
| Web browser? | ❌ | ❌ |
| Email app? | ❌ | ❌ |
| Dropbox & Google Drive? | ❌ | ❌ |
| Hardware specifications | ||
| Internal storage | 0.016 GB | 16 GB (on incl. SD card) |
| RAM | ? | 0.4 MB |
| CPU clock speed | 0.24 GHz dual core(ESP32-S3) | 0.16 GHz (ESP32-C3) |
| Other built in: | Speaker, camera (optional, +~$20) | MagSafe magnet, NFC, gyroscope (shake to turn page) |
| Ports & battery | ||
| MicroSD card reader? | ✔ | ✔ |
| 3.5 mm AUX out port? | ❌ | ❌ |
| Other ports? | ❌ | ❌ |
| Battery capacity (3.7V) | 1000 mAh | 650 mAh |
| (USB) charging port | USB-C | Pogo pins |
| Physical specifications | ||
| Waterproof? | No | No |
| Size (cm H×W×D): | 10.7×6.37×0.67 | 9.8×6.4×0.51 |
| Weight (gram): | 70 | 55 |
| Size (inch H×W×D): | 4.21×2.51×0.26 | 3.86×2.52×0.20 |
| Weight (oz): | 2.47 | 1.94 |
| Screen: flush or recessed? | Flush | Flush |
| Color options: | White | Black, white |
| Accessories in the box | Case, lanyard | 32 GB microSD card, screen protector, MagSafe ring stickers |
| More information | ||
| Model number | MetalioEInk4-FE3D | X3 |
| User guide / manual | User Guide | User Guide |
| Official site link: | Metalio.world | Xteink.com |
| Brand origin | China | China |
| Check price & reviews | ||
| See price and reviews: | AliExpress | Xteink, Amazon |
Metalio E-Ink 4 vs Xteink X3
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