Rogbid Fusion: A $50 Ring That Tracks Heart Rate, Sleep, and 100+ Sports
The Rogbid Fusion is a budget $49.99 smart ring that adds heart-rate, blood-oxygen, sleep tracking, and 100+ sports modes, with a 0.49-inch OLED display; it ships with a magnet Milanese strap but can swap in a nylon strap to wear on the wrist, and bets on about five days of battery life (eight on standby).