No, you should not download KingRoot for Android 8.1.0 in 2021 or later. KingRoot is technically incapable of rooting devices running Android versions higher than 6.0.1 Marshmallow. Attempting to use it on Android 8.1 (Oreo) will likely result in failure, potential device "bricking," or the installation of unwanted malware and adware. Review: KingRoot for Android 8.1.0 (2021)

: Uses a cloud database to find the most effective "exploit" or rooting method specifically for your device model and firmware. System Customization

While searching for "KingRoot Android 8.1.0 APK download 2021," it is important to note that

While the technology was innovative, KingRoot in 2021 was also controversial due to privacy concerns and aggressive adware. For modern devices, using the device manufacturer's official bootloader unlocking method (via Fastboot/OEM Unlock) coupled with Magisk is generally considered the safer and more transparent standard for rooting.