I spent a month with the Xteink X4 Pro — and while I love this tiny $99 ereader, it won’t be replacing my ViWoods AiPaper Reader just yet

The reviewer tested the Xteink X4 Pro, a tiny $99 e-reader designed to magnetically attach to the back of a smartphone. While its slim profile and lightweight design make it highly portable, the device feels fragile and prone to shifting or detaching when used with a phone case. On the hardware side, it offers a crisp 4.3-inch touchscreen, a capable front light, and a long-lasting battery. However, it relies on a fiddly proprietary charger instead of USB-C to maintain its compact size. The device's biggest drawback is its software. The stock operating system is clunky, prompting tech-savvy users to flash custom firmware for a better experience. Furthermore, because it does not run Android, users cannot install Kindle or Kobo apps, making it a chore to transfer and read DRM-protected books. Ultimately, the X4 Pro is recommended only for tech enthusiasts who enjoy tinkering with devices. While the reviewer appreciates its ultra-portability, its various friction points mean it won't replace their main ViWoods AiPaper Reader just yet.