RIFESI brings a titanium smart ring to the fitness tracking space that prioritizes comfort and all-day wearability. The ring measures just a few millimeters thick, so you can wear it to bed without noticing it. That matters because sleep tracking only works if you actually keep the thing on. It monitors deep sleep, light sleep, and awake time, then stores the data in the free app. Shift workers and frequent travelers will find the insights useful for rebuilding disrupted sleep patterns.

The ring uses 4.0 sensors to track heart rate, blood oxygen, and blood pressure automatically every 30 minutes. That means you get consistent health data without having to tap or trigger anything. It stores up to 64 MB of data and syncs to your smartphone. The 5ATM waterproof rating covers handwashing and light swimming, so you don’t need to take it off for daily activities. The titanium build keeps it lightweight and minimal, which helps it blend in with regular jewelry.

Battery life is decent for a device this small, and the ring charges via a included Lithium Ion battery. The app interface is straightforward, though you will need to spend a few minutes setting up your baseline measurements. The all-day health monitoring is the main draw here, and RIFESI delivers that without demanding much from you in return.