What people try
4Home blood pressure monitorsStage 4 · Widely recommended · Over the counter at pharmacies and onlineHome blood pressure monitoring means people measure their own blood pressure outside a clinic, using a home device.Main risk: Home monitors might not always be correct, and they do not replace medical visits.2Fitness trackers: watches, bands and ringsStage 2 · Small studies in people · Over the counterSmartwatches and fitness trackers are wrist-worn monitors that people commonly use to count their steps each day.Main risk: The pages stress that wrist-worn monitors may not count steps as accurately as hip-worn pedometers.2Continuous glucose monitorsStage 2 · Small studies in people · Some over the counter; others by prescriptionA continuous glucose monitor is a device that measures blood sugar every few minutes using a sensor placed under the skin.Main risk: Continuous glucose monitors are described as sometimes still needing a regular meter to confirm results and set up the device.2Sleep trackersStage 2 · Small studies in people · Over the counterSleep trackers are wearable devices and apps that claim to measure how long and how well you sleep.Main risk: A review of studies found wrist-worn sleep trackers are not as reliable as polysomnography, a lab sleep test, for key measures like total sleep time.2Smart scalesStage 2 · Small studies in people · Over the counterBioelectrical impedance is one way to measure muscle mass in studies of muscle loss.
Products
Sorted by the best research stage of each product's ingredients, then by price. The stage describes research on the ingredient, not proof that the product works.
Devices
iHealth Track Blood Pressure MonitorHome blood pressure monitors4 This type: widely recommended$59.99iHealth Neo Wireless Blood Pressure MonitorHome blood pressure monitors4 This type: widely recommended$79.99Pro-Series Bluetooth Blood Pressure MonitorHome blood pressure monitors4 This type: widely recommended$79.995 Series® Upper Arm Blood Pressure MonitorHome blood pressure monitors4 This type: widely recommended$83.99Ultraconnect WirelessHome blood pressure monitors4 This type: widely recommended$94.6410 Series® Upper Arm Blood Pressure MonitorHome blood pressure monitors4 This type: widely recommended$118.99BPM ConnectHome blood pressure monitors4 This type: widely recommended$129.95BPM VisionHome blood pressure monitors4 This type: widely recommended$179.95Stelo Wearable Glucose BiosensorContinuous glucose monitors2 This type: small studies in people$37.99Helio StrapFitness trackers: watches, bands and rings2 This type: small studies in people$99.99Fitbit Charge 6Fitness trackers: watches, bands and rings2 This type: small studies in people$159.95Dexcom G7 15 DayContinuous glucose monitors2 This type: small studies in people$192.52RingConn Gen 2 AirFitness trackers: watches, bands and rings2 This type: small studies in people$199Sleep AnalyzerSleep trackers2 This type: small studies in people$199.95Amazfit Helio Strap ProFitness trackers: watches, bands and rings2 This type: small studies in people$199.99Garmin Index™ S2 Smart ScaleSmart scales2 This type: small studies in people$199.99MorphoScan Nova Body Composition ScaleSmart scales2 This type: small studies in people$199.99Polar LoopFitness trackers: watches, bands and rings2 This type: small studies in people$199.99Apple Watch SE 3Fitness trackers: watches, bands and rings2 This type: small studies in people$229Body CompSmart scales2 This type: small studies in people$229.95Hume Band 2.0Fitness trackers: watches, bands and rings2 This type: small studies in people$249Google Pixel Watch 4Fitness trackers: watches, bands and rings2 This type: small studies in people$249.99Galaxy RingFitness trackers: watches, bands and rings2 This type: small studies in people$299.99Galaxy Watch8Fitness trackers: watches, bands and rings2 This type: small studies in people$299.99vívoactive 6Fitness trackers: watches, bands and rings2 This type: small studies in people$299.99RingConn Gen 3Fitness trackers: watches, bands and rings2 This type: small studies in people$349WHOOP MGFitness trackers: watches, bands and rings2 This type: small studies in people$359Galaxy Watch9Fitness trackers: watches, bands and rings2 This type: small studies in people$379.99Apple Watch Series 11Fitness trackers: watches, bands and rings2 This type: small studies in people$399Oura Ring 5Fitness trackers: watches, bands and rings2 This type: small studies in people$399Ultrahuman Ring PROFitness trackers: watches, bands and rings2 This type: small studies in people$479Body ScanSmart scales2 This type: small studies in people$499.95Venu® 4Fitness trackers: watches, bands and rings2 This type: small studies in people$549.99ScanWatch NovaFitness trackers: watches, bands and rings2 This type: small studies in people$599.95Eight Sleep PodSleep trackers2 This type: small studies in people$1,224
What others are writing
Recent articles from health journalists, hospitals and universities. We link to them; we don't write or endorse them.
Do Fitness Trackers Really Work? ↗
Fitness trackers: watches, bands and rings: The article says few fitness trackers have been validated, with step count and heart rate the most accurate metrics.
Continuous glucose monitors: New guidelines recommend expanding CGM use for people with diabetes ↗
Continuous glucose monitors: New diabetes guidelines recommend continuous glucose monitors for many people with type 2 diabetes to help reduce heart-related risks.
A More Accurate Measure of Calories Burned ↗
Fitness trackers: watches, bands and rings: A Harvard study describes a smartphone-based calorie monitor that it says outperforms smartwatches and fitness trackers, which often estimate calorie burn inaccurately.
How to think about blood sugar during the holidays ↗
Continuous glucose monitors: A health correspondent describes wearing a continuous glucose monitor to manage prediabetes and how it tracks blood sugar after meals.
This is general information gathered from the sources listed, not medical advice. Talk to your doctor before starting anything new.