Point your phone at a desk or the floor, tap to set the puzzle down, then drag a face to twist it. Scramble it, solve it, walk around it. It stays where you put it.
Build 8: his flame 3x3, standing still — it turns only under your finger, never on its own. Grabs now land on the piece you see: every piece carries an invisible grab box the size of its full cell, so a tap between the sculpted pieces can't fall through a gap or slide off a sloped face anymore. The layer tracks your finger and settles on the nearest quarter turn, and a flick finishes a turn you started. Step reporter still on duty. Needs Chrome on Android with ARCore (your S20 and S9 both qualify). The camera feed stays live behind the puzzle, nothing is recorded.
Move the phone slowly until the ring finds your surface, then tap to place the puzzle.