A glucose meter (or glucometer) is a medical device for determining the approximate concentration of glucose in the blood. A small drop of blood, obtained by pricking the skin with a lancet, is placed on a disposable test strip that the meter reads and uses to calculate the blood glucose level. The meter then displays the level in units of mg/dl or mmol/l. A glucose meter does NOT determine lactose intolerance, gluten sensitivity, or food allergies.
https://en.wikipedia.org/wiki/Glucose_meter

A Meter That’s Accurate, Small, and Inexpensive
The new Jazz Wireless 2 meter from AgaMatrix of Salem, New Hampshire
https://www.healthcentral.com/article/a-meter-thats-accurate-small-and-inexpensive

Best Glucometers (Updated)
https://bestreviews.com/best-glucometers

Dario Blood Glucose Management System
We’ve embedded the lancing device, the meter and the strips into a pocket-sized, all-in-one device which is perfect for your on-the-go lifestyle. The Dario’s all-in-one device along with our free mobile application lets you check blood glucose levels in seconds, quickly and accurately, directly on your smartphone.
https://mydario.com/

FreeStyle Precision Neo Blood Glucose Monitoring System – Walmart.com
https://www.walmart.com/ip/FreeStyle-Precision-Neo-Blood-Glucose-Monitoring-System/44115307

FreeStyle Precision Neo Blood Glucose Test Strips, 50 count – Walmart.com
https://www.walmart.com/ip/FreeStyle-Precision-Neo-Blood-Glucose-Test-Strips-50-count/44115306

iHealth Smart Gluco-Monitoring System
https://ihealthlabs.com/glucometer/wireless-smart-gluco-monitoring-system/

One Drop
One Drop | Chrome is a Bluetooth blood glucose monitor that syncs with the One Drop | Mobile app. Get all the test strips you need with a One Drop | Premium or One Drop | Plus subscription.
https://onedrop.today/