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People living with diabetes should check their blood sugar regularly. There are currently two main options for monitoring glucose levels — continuous glucose monitoring devices and blood glucose meters. The best monitors give reliable, consistent readings to help guide a person’s treatment.
- Best for continual measurement from a below-skin sensor: Dexcom G6 CGM System | Skip to review
- Best for predictive glucose spike warnings: The Guardian Connect System | Skip to review
- Best for glucose alarms: FreeStyle Libre 2 System | Skip to review
- Best for tracking and sharing with medical professionals: Contour Next One | Skip to review
- Best for a monthly digital subscription: One Drop Glucose Meter | Skip to review
- Best for complete diabetes management: Dario Smart Glucometer | Skip to review
- Best for a free meter: Accu-Chek Guide Me meter | Skip to review
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- Price: MNT chooses products available for a wide range of budgets. Insurance can often cover the price of the products, depending on an individual’s plan.
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Medical News Today follows a strict product selection and vetting process. Learn more here.
Below, we look at some of the best continuous glucose monitoring (CGM) devices and blood glucose meters (BGMs) for a person to consider.
Please note that the writer of this article has not tried these products. All information presented is purely research-based and correct at the time of publication.
Medical News Today follows a strict product selection and vetting process. Learn more here.
Best for continual measurement from a below-skin sensor: Dexcom G6 CGM System
- List price: no information available
- Monitor type: continuous glucose monitor
The Dexcom G6 CGM System is a CGM that provides automatic blood sugar updates to a connected device.
The transmitters send information to an app that a person can then access via their smartphone, tablet, or computer. It can also work with a specific device transmitter that a person with Medicare coverage needs for reimbursement.
The compatible app can send notifications if glucose levels drop too low or spike too high.
Dexcom sensors last up to 10 days, and the transmitters last up to 90 days. A person must regularly replace both.
The compatible app can send notifications if glucose levels drop too low or spike too high.
Insurance coverage
Individuals can purchase the Dexcom system at various pharmacies, such as Costco and Walgreens.
This CGM device varies in price according to a person’s insurance coverage. As of 2022, Medicare covers the cost of the Dexcom G6 so long as a person has type 1 or type 2 diabetes, is on intensive insulin therapy, and meets any other coverage criteria.
Pros
- automatic blood sugar updates
- compatible with most smart devices
- Medicare and insurance coverage
Cons
- people need to replace the sensor every 10 days
- people need to replace the transmitter every 90 days
- costs vary depending on insurance coverage, and many online retailers are not upfront about the price
Best for predictive glucose spike warnings: The Guardian Connect System
- List price: no information available
- Type of monitor: continuous glucose monitor
The Guardian Connect System from Medtronic is a CGM that predicts potential spikes in glucose levels and sends warning alerts accordingly. The company offers features such as:
- a 30-day free trial
- rechargeable transmitter
- app for both Android and iOS devices
Individuals can register for a 30-day free trial by completing a form on the company’s website.
Insurance coverage
This CGM device varies in price according to a person’s insurance coverage and pharmacy system. The Guardian Connect CGM evaluation program allows a person to try the system with no out-of-pocket costs for 30 days.
Medtronic is working with over 600 insurance companies to make the device financially accessible to a broader group of people.
Pros
- 30-day free trial
- rechargeable transmitter
- coverage with. more than 600 insurance companies
Cons
- costs may vary widely depending on a person’s insurance coverage
- the company does not include transparent pricing details
Best for glucose alarms: FreeStyle Libre 2 System
- List price: no more than $60 per month with insurance
- Type of monitor: continuous glucose monitor
The FreeStyle Libre 2 system is another CGM that automatically measures glucose levels.
Some features include:
- optional glucose alarms
- 14-day free trial period with guided “how-to” support
- sensors that last for 14 days
The system currently requires a person to use a compatible device. As of 2021, the app for this system is FDA-approved.
Individuals can sign up for a free trial on the company’s website.
Insurance coverage
This CGM device varies in price according to a person’s insurance coverage. According to the website, a person with private health insurance will pay no more than $60 each month for FreeStyle Libre 2 sensors and no more than $65 each month for a FreeStyle Libre 2 reader.
The product website also notes that the FreeStyle Libre 2 system costs 70% less than the list price of other CGM systems.
Pros
- automatic measurements
- sets alarms for glucose levels outside the target range
- has FDA-approval
- offers a free trial
Cons
- not all insurance will cover this system
- people must replace the sensors every 14 days
- the free trial is not as long as some competitors
Best for tracking and sharing with medical professionals: Contour Next One
- List price: from around $29
- Type of monitor: blood glucose meter
The Contour Next One is a BGM that uses test strips to provide accurate blood glucose measurements. Some features include:
- ease of use, with test results within 5 seconds
- second-chance technology — allowing a person to reuse the same test strip if they did not take enough blood the first time
- connection to a free Contour Diabetes app for tracking and sharing data
The Contour Next One system requires that a person use the same brand test strips for accurate results.
Insurance coverage
This BGM device may vary in price according to a person’s insurance coverage. Medicare B covers the cost of Contour Next test strips.
People who sign up for the Contour Choice Savings Card program can save money on test strips.
Pros
- offers quick results with accurate readings
- compatible with a free app
- a more affordable nonprescription option
Cons
- only works with Contour One test strips
Best for a monthly digital subscription: One Drop Glucose Meter
- List price: from $33.98 per month
- Type of monitor: blood glucose meter
OneDrop is a BGM that uses a small amount of blood to test blood glucose levels. A person can purchase a kit that includes:
- an FDA-approved digital meter that has app connectivity via a subscription
- 25 test strips
- 10 lancets
- carrying case
- lancing device
- batteries
The consumer may choose the One Drop Premium plan that includes:
- health coaching
- personalized content
- information on blood pressure
- health tracking data
Individuals may choose to sign up for monthly or yearly subscriptions to the test strip plan and automatically receive 50 testing strips each month.
Some consumers choose The One Drop Complete Diabetes plan, which includes the glucose meter kit, test strip plan, and One Drop Premium with one-on-one health coaching and a free blood glucose meter.
A person can sign up for any of these plans on the company website.
Insurance coverage
One Drop states that insurance does not cover its products as it provides a direct-to-consumer service. People will need to pay out of pocket to purchase this device and its subscriptions.
Pros
- offers health coaching
- offers personalized content
- offers a variety of subscription plans depending on how often a person measures their blood glucose
Cons
- One Drop does not accept insurance
- a subscription can cost up to $90 per month, which may become costly
Best for complete diabetes management: Dario Smart Glucometer
- List price: $34.90
- Type of monitor: blood glucose monitor
The FDA-approved Dario Smart Glucometer is a BGM glucometer that connects to both iOS and Android smartphone devices. It syncs with the Dario app to measure, record, and track blood glucose levels.
This monitor also measures a person’s carb intake, blood pressure, weight, physical activity, and more to provide complete diabetes management. The product provides options for on-demand sharing and emergency hypo-alerts with a GPS locator.
Those who purchase Dario’s blood glucose meter starter kit receive:
- all-in-one glucose reader
- 10 lancets
- 25 test strips
- a free mobile application
Dario offers the Diabetes Success Plan that includes individual and personalized support from a Dario Coach. The plan also includes diabetes supplies, such as unlimited strips and lancets.
Dario also offers a Pro Membership plan that includes:
- Free blood glucose monitoring system
- 100 lancets
- Unlimited test strips
- Smart app connection
- Weekly progress reports
- Personalized diabetes programs for lifestyle and eating habits
- Live coaching webinars
- Advice from a personal specialist
Insurance coverage
Dario states that it has partners that it will work with to verify a person’s insurance benefits. If a person is eligible, insurance will cover the cost of the monitor and test strips.
However, insurance does not cover the cost of the Pro Membership Plan.
Pros
- emergency alerts with GPS sharing
- returns results within six seconds
- weekly progress reports
- personalized diabetes programs for lifestyle and eating changes
- live coaching webinars
- offers insurance coverage
Cons
- the Pro Membership Plan may be too expensive for some people
Best for a free meter: Accu-Chek Guide Me meter
- List price: from $14.99
- Type of monitor: blood glucose monitor
The Accu-Chek Guide Me meter has a large, easy-to-read display. The company states that this model is its most accurate device yet.
It is compatible with the mySugr App, which allows people to track their measurements, meals, and more.
Accu-Chek offers the Guide Me meter for free, or people can purchase the meter directly from the website. To claim a free meter, a person must fill out an online form.
The company also provides coupons for use in a pharmacy and bundle packs that reduce the overall cost of glucose monitors and test strips. People can learn more about the company’s discount programs on its website.
Insurance coverage
Accu-Chek states that Medicare Part B covers its glucose monitors.
Private insurance coverage may vary. People should contact their insurance providers for more information.
Consumers may save on Accu-Chek products through their pharmacy with the Accu-Chek Pharmacy Discount Program. The Accu-Chek Simply Start kit currently costs around $49.99. Consumers may then also save on refills through the Simply Refill program.
Pros
- easy-to-read LCD screen
- four-second results time
- Bluetooth connectivity
- pharmacy discount program
- people can receive a free meter
Cons
- the monitors are only compatible with Accu-Chek test strips
- some reviewers state the product has a short battery life
The table below gives a snapshot of how the best blood glucose monitors compare.
| Price | Monitor type | Free trial | Insurance coverage | |
|---|---|---|---|---|
| Dexcom G6 | no information available | CGM | no | Medicare and private insurance |
| Guardian | no information available | CGM | 30 days | over 600 insurance companies |
| FreeStyle Libre | up to $60 per month | CGM | 14 days | Medicare and private insurance |
| Contour Next One | from around $29 | BGM | no | Medicare and private insurance |
| One Drop | from $33.98 per month | BGM | no | none available |
| Dario | $34.90 | BGM | no | Medicare and private insurance |
| Accu-Chek Guide Me | from $14.99 | BGM | no | Medicare and private insurance |
There are two types of glucose monitors:
- continuous glucose monitor (CGM)
- blood glucose meter (BGM)
Both types of monitors have different characteristics, benefits, and drawbacks that a person with diabetes should consider.
Both CGM and BGM monitors require a prescription.
CGMs
CGMs check blood sugar levels automatically at timed intervals. In most cases, they reduce the number of times a person needs to prick their finger to test blood sugar levels during the day.
A
A CGM contains three components:
- sensors
- transmitters
- receivers or display units
The sensors test for the presence of glucose and create an electrical current that transmitters pass along to receivers. The device tests every 5 minutes and either provides real-time data, a regular report, or a combination of both.
Some CGMs require regular calibration using BGMs, while others may need infrequent calibration. A person should follow all instructions from their doctor, healthcare professional, and the device manufacturer.
Each part of the unit usually has a separate cost, and both sensors and transmitters need regular replacement. How often a person should replace the strips or transmitters can vary by brand, as can the price.
CGM pros and cons
Pros
- According to a 2020 study, CGMs improved glycemic control in people with types 1 or 2 diabetes.
- A
2019 study found that CGMs can help with assessing periods of extreme fluctuations in blood sugar levels. - CGMs prevent periods of extremely low blood sugar levels.
- CGMs insert under the skin and therefore reduce the need for repeated finger pricks.
Cons
- Most CGMs still need at least
two finger pricks per day for calibration. - Doctors cannot make a treatment decision based on CGM data alone.
- CGMs are
often more expensive than BGMs. - User error, including device installation, can hinder effectiveness.
- Requires under-skin insertion, which may deter some people.
BGMs
BGMs are single-use blood tests to check blood glucose levels. It is a manual process in which a person needs to prick their finger, collect a blood sample, and run the test to obtain their current blood sugar level.
BGM pros and cons
Pros
- They provide accurate results.
- BGMs are often less expensive than CGMs.
- Added features on some models can provide additional benefits, such as not needing test strips and downloadable results.
Cons
User error can affect accuracy.- They provide limited data.
- A person needs to do multiple daily finger pricks.
A person with diabetes may need to check their blood sugar levels several times daily. According to the
- when first waking up or after a long fast
- before a meal
- 2 hours after a meal
- before going to sleep
A person should check with their doctor how often they should self-monitor their glucose levels with a BGM.
When using a CGM, the device will typically check blood glucose levels every
Individuals with diabetes will typically monitor glucose levels with either BGMs or a combination of BGMs and CGMs. Some of the following factors may affect a person’s decision to purchase a particular brand or product:
- Cost: BGMs are generally less expensive than CGMs.
- Insurance or Medicare coverage: How much of the costs will insurance cover?
- Ease of use: How easy are the devices to use, including running tests and recording data?
- Added features: Several devices come with companion software, different display options, and other features a person may find appealing.
- Third-party testing and US Food and Drug Administration (FDA) approval: Blood glucose monitors are medical devices that should undergo independent testing and obtain FDA approval.
The
When using a BGM, the
- never share any needles or other portions of the device that come in contact with blood
- thoroughly wash hands with soap and water before testing
- clean and check the monitor before use
- properly dispose of the lancet and strip
- store test strips at room temperature
According to the
It is also important to seek professional advice if a person’s blood glucose levels are higher or lower than typical.
People with diabetes should see their healthcare team at least twice a year. The CDC also recommends people visit a dentist, eye doctor, and foot doctor at least once a year to screen for any diabetes complications.
Learn more about the complications of uncontrolled diabetes here.
Here we answer some common questions about these devices.
What is a normal blood sugar level for a person with diabetes?
Doctors classify diabetes as a fasting blood sugar test of
People with prediabetes will typically have fasting blood sugar levels of 100—125 mg/dL and glucose tolerance test levels of 140—199 mg/dL.
According to the CDC, a person with diabetes should aim for
Can I check my blood sugar without pricking myself?
Yes, continuous glucose monitoring systems (CGMs) attach to a person’s skin and use a sensor to give continuous blood sugar readings. With these devices, a person does not have to use a lancet to prick the skin.
What is normal blood sugar for a person without diabetes?
A person without diabetes will have
Which glucose meter is most accurate?
All glucose meters are usually as accurate as each other. Instead, people may wish to compare the features to see which best suits their needs.
For example, some devices sync to a smartphone app that automatically tracks their measurements over time. This may provide a more accurate long-term view than relying on users to record their blood sugar level fluctuations by themselves.
What brand of glucose meter is covered by Medicare 2023?
Medicare Part B covers blood glucose monitors that a doctor prescribes, so long as the suppliers and doctor are enrolled in Medicare.
Freestyle and Dexcom are two companies that are enrolled in Medicare.
Is there a device to check blood sugar without pricking your finger?
Continuous glucose meters (CGMs) are devices that measure blood glucose levels without the need to prick a finger.
Learn more about CGMs here.
What is the difference between a glucose monitor and a glucose meter?
A glucose monitor and a glucose meter are the same devices.
Glucose monitors test glucose levels to help a person better manage their type 1 or type 2 diabetes. There are two main types of monitors, CGMs and BGMs.
CGMs provide regular, automatic monitoring of glucose levels, and BGMs require manual blood sugar tests, typically using a finger prick.
Both have some advantages and disadvantages in their use. A person should consult their doctor about the best glucose monitor device to fit their needs and lifestyle.
Please note: Medical News Today does not imply warranty of fitness for a particular purpose or endorse any of these applications. Medical News Today has not evaluated these for medical accuracy. The Food and Drug Administration (FDA) has not approved them unless otherwise indicated.