Table 2.
Advertised claims and specifications of various popular devices on the market. Two asterisks (**) denotes availability with an additional paid monthly subscription. (d, days; gen, generation; hrs, hours; m, month; RR, respiration rate; Temp, temperature).
| Device | Location | Marketed Terminology | Advertised Capabilities | Battery Life | Cost | Year of Release | |||
|---|---|---|---|---|---|---|---|---|---|
| Sleep/Wake | Sleep Staging | Nocturnal Physio | Other | ||||||
| Amazon Halo | Wrist | “Health & wellness band” | X | X | Temp | 7 d | $100 + $4/m | 2020 | |
| Apple Watch Series 6 | Wrist | “Watch” | X | 18 hrs | $400 | 2020 | |||
| Fatigue Science Readiband | Wrist | “Sleep collection device” | X | 30 d | $500 | 2010 | |||
| Fitbit Ionic | Wrist | “Smartwatch” | X | X | X | 5 d | $250 | 2017 | |
| Fitbit Sense | Wrist | “Smartwatch” | X | X | X ** | Temp | 6 d | $300 | 2020 |
| Garmin Vivosmart 4 | Wrist | “Sport and fitness tracker” | X | X | 7 d | $130 | 2018 | ||
| OURA (2nd gen.) | Finger | “Sleep tracking smart ring” | X | X | X | Temp, RR | 7 d | $300 | 2018 |
| Polar A370 | Wrist | “Fitness tracker watch” | X | 5 d | $150 | 2017 | |||
| Polar Grit X | Wrist | “Outdoor multisport watch” | X | X | X | RR | 7 d | $430 | 2020 |
| Whoop 3.0 | Wrist | “Recovery, fitness, and sleep tracker” | X | X | RR | 5 d | $30/m | 2019 | |