Yes, using a portable version of LDPlayer is legal. LDPlayer itself is freeware based on Android Open Source Project (AOSP). Repackaging the executable for personal portability falls under fair use, provided you are not redistributing it for profit or claiming it as your own.
That night, he plugged it into a car battery jumper pack he’d modified. The screen flickered – a sickly green phosphor glow, not LCD, but something older. A vacuum fluorescent display. It hummed. A laser sled whirred inside, seeking. ld player portable
No registry changes or system file modifications are made to the host PC. Yes, using a portable version of LDPlayer is legal