PocketBook InkPad 4 | Eye-Friendly Audio & E-Book Reader | Large 7.8ʺ E-Ink Display | Anti-Scratch Protection | Text-to-Speech Function | Bluetooth® | Built-in Speaker | SMARTlight | IPX8 Waterproof vs XTEINK X4 E-Book Reader, 4.3" Portable Pocket E-Ink eReader with Physical Page-Turn Buttons, Ultra-Thin 0.23 inch&2.72 oz, Magnetic-Ready Design,Distraction-Free Reading, 16GB Storage, Frost White

Display Size and Reading Experience

The PocketBook InkPad 4 offers a significantly larger 7.8-inch E-Ink display, ideal for immersive reading sessions, while the XTEINK X4 features a compact 4.3-inch screen designed for portability. The larger screen on the InkPad 4 provides a more paper-like experience with enhanced text clarity and reduced eye strain during extended use. In contrast, the XTEINK X4’s smaller display is better suited for quick reading breaks or on-the-go use, though it limits visual comfort for longer books. The InkPad 4’s E-Ink Carta 1200 technology ensures glare-free visuals, making it superior for low-light environments. Meanwhile, the XTEINK X4’s 4.3-inch screen delivers a natural reading feel but lacks advanced lighting controls. For readers prioritizing screen size and visual quality, the InkPad 4 clearly outperforms the XTEINK X4.

Audio and Text-to-Speech Capabilities

The PocketBook InkPad 4 includes built-in speaker and Bluetooth connectivity, enabling users to listen to audiobooks directly from the device. Its Text-to-Speech function allows any text file to be read aloud with a natural-sounding voice, offering flexibility between reading and listening. This feature is absent in the XTEINK X4, which focuses solely on static text display without audio playback. While the XTEINK X4 supports thousands of books via its 16GB storage, it cannot convert text into spoken audio. The InkPad 4’s audio integration makes it ideal for multitaskers or those who enjoy auditory learning. For users seeking an all-in-one reading and listening experience, the InkPad 4 is the only viable option in this comparison.

Lighting and Eye Comfort Features

The PocketBook InkPad 4 features an adjustable SMARTlight system that lets users modify both brightness and color temperature—offering warm or cool tones depending on ambient lighting. This functionality enhances eye comfort in various environments, including complete darkness. The XTEINK X4 does not mention any frontlight adjustment capabilities, relying instead on ambient light for visibility. Without customizable lighting, users may experience discomfort in dim settings. The InkPad 4’s ability to adapt to different lighting conditions gives it a clear advantage in usability across diverse environments. For readers sensitive to screen glare or those who frequently read at night, the InkPad 4’s advanced lighting control is a decisive benefit.

Portability and Physical Design

The XTEINK X4 wins decisively in portability: it weighs just 2.72 oz and measures 0.23 inch thick, making it ultra-thin and easy to slip into a pocket or small bag. The PocketBook InkPad 4, while still lightweight, is substantially bulkier and heavier due to its larger screen and additional hardware. The XTEINK X4 also includes a magnetic-ready design, allowing users to attach it to compatible surfaces like phone cases using a separate ring. The PocketBook InkPad 4 has no such attachment feature. For travelers, commuters, or anyone valuing minimalism, the XTEINK X4’s slim profile and magnetic compatibility offer unmatched convenience. However, the trade-off is a much smaller screen and fewer multimedia functions.

Water Resistance and Durability

The PocketBook InkPad 4 boasts IPX8 waterproofing, meaning it can withstand immersion up to 2 meters deep for 60 minutes. It also features anti-scratch protection on the screen, ensuring long-term durability against daily wear. The XTEINK X4 uses high-aluminosilicate glass for improved strength and clarity but does not list any water resistance rating. While its glass etching enhances screen resilience, it lacks official waterproof certification. For users who read near water sources, in humid climates, or want peace of mind against accidental spills, the InkPad 4’s IPX8 rating is a major safety advantage. The XTEINK X4 remains vulnerable to liquid damage despite its durable construction.

Storage and File Format Support

The PocketBook InkPad 4 supports 25 popular file formats, including EPUB, PDF (DRM), DOC, FB2, DJVU, JPEG, CBR, and CBZ—eliminating the need for file conversion. This broad compatibility allows users to access a vast library of books, documents, and images directly. The XTEINK X4 offers 16GB of internal storage, sufficient for thousands of books, but no details are provided about supported formats beyond general e-reader compatibility. Given that the InkPad 4 explicitly lists 25 formats, it provides greater flexibility and convenience for users with diverse digital content. For readers who work with multiple file types or prefer not to convert files, the InkPad 4’s format support is a significant practical edge.

Battery Life and Charging

The XTEINK X4 claims a battery life of up to 14 days on a single charge under typical usage (1–3 hours per day), powered by a 650 mAh battery. This long endurance makes it ideal for extended trips without frequent charging. The PocketBook InkPad 4 does not specify its battery duration, though its larger screen and additional features like Bluetooth and built-in speaker likely result in shorter runtime. While the XTEINK X4’s 14-day estimate is impressive, the lack of official battery data for the InkPad 4 prevents direct comparison. Still, the XTEINK X4’s stated longevity gives it a clear advantage for users prioritizing minimal charging interruptions.

Which should you buy?

If your priority is a premium reading experience with a large, glare-free display, built-in audio, and robust durability—including waterproofing and scratch resistance—the PocketBook InkPad 4 is the superior choice. Despite costing $230 more than the XTEINK X4 ($299.00 vs. $69.00), it offers far greater functionality, especially for audiobook lovers and those who read in varied lighting or challenging environments. However, if portability, weight, and simplicity are paramount—especially for short reading sessions on the go—the XTEINK X4 is an excellent value. At $69.00, it’s about 77% cheaper than the InkPad 4 and excels as a distraction-free, ultra-thin companion. Choose the PocketBook InkPad 4 for versatility and performance; choose the XTEINK X4 for minimalist, pocket-friendly reading.