Lumen
What it is: By blowing into its device, Lumen claims to help users hack their metabolism. How? By telling them if their body is using fats or carbs for fuel. Based on that, it gives food recommendations.
Verdict: Pass
"The accuracy of the readings can be questionable on many occasions. If tightening up your nutritional habits is more of a priority than worrying about your metabolic rate, you're better off with an app that offers bigger meal planning libraries or more advice on the benefits of specific nutrients and how you can functionally build your own program," says Walker.
Whoop
What it is: A lightweight and waterproof fitness tracker that measures your sleep, workout intensity and how your body recovers from your workouts. It then gives advice based on the user's results.
Verdict: Buy
"I am a huge advocate for quality sleep as our entire well-being starts with whether or not we have had quality sleep. It's important to understand how to recover. There are a number of controllable things people take for granted or don't prioritize until it's an issue. Whoop can provide valuable lifestyle feedback to help people make huge day-to-day changes for their mental and physical well-being," says Borden.
Oura Ring
What it is: A wedding band-like sleep tracker that collects data about your body, activity and sleep using heart rate monitoring.
Verdict: Buy
"I personally would not want to wear a ring because it would get in the way of my daily activity, but the Oura Ring can provide valuable feedback that could help some people make positive overall lifestyle changes," says Borden.
