Center Duo

Test blood sugar on your phone and get AI coaching.

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Duo glucose monitors are just $45. Choose your test strip plan with 50 strips for $16/mo or unlimited for $29/mo. Free shipping on everything. No prescription needed.

  • 📦 Free Shipping

  • ★★★★★
    Over 10,000 Members Served

  • 💙 HSA & FSA Eligible

  • 1. Plug Center Duo and test strip into your phone's charging port

  • 2. Check your blood sugar like normal

  • 3. All done! As you test, your AI coach Aria will learn about your unique diabetes and offer tips.

Introducing Aria, your AI health coach

As you use Center Duo, Aria learns about your unique glucose levels and offers recommendations to help you improve your blood sugars.

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Aria Adapts to You

Aria is programmed with the latest information in glucose management, from books, blogs, human coaching training resources, news articles, scientific papers and more to determine what recommendation is best suited to you at a specific time.

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  • 2 Sensors

    Our dual sensor measures glucose and hematocrit to correct for blood plasma levels for accurate readings every time.

  • FDA Approved

    Center Duo exceeds FDA's latest blood glucose monitoring guidelines. Operating range of 20mg/dL to 600mg/dL and hematocrit range of 20-70%.

  • YSI Verified

    • 100% of readings within 15mg/dL of YSI lab values
    • 98% of readings within 10mg/dL of YSI lab values
    • 42% of readings within 5mg/dL of YSI lab values

See how daily life affects your blood sugar

See your A1C, sync fitness trackers, track diet, sleep, exercise, medications and more to understand what's affecting your blood sugars, all from the Center Health app.

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Share data with doctors and loved ones

Center Teams lets you easily share real-time results.

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  • 1.8% average A1C reduction

    For people with uncontrolled diabetes (A1C ≥9.0%) in 4 months.

  • 80% of members maintain in-range blood sugar averages

  • 3.2% average A1C reduction for 72% of people with uncontrolled diabetes (A1C ≥9.0%)

Unlimited test strips

When Aria detects you're getting low on test strips, she'll automatically ship you more. No more running low on test strips.

💊 No prescription needed!

😍 No more dealing with pharmacies or insurance companies

💳 FSA & HSA spending account eligible

🚚 All shipping and tax included

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  • "Phenomenal customer service" ★★★★★

    I don't have diabetes but I need to monitor my glucose frequently because of reactive hypoglycemia and have had LOTS of questions. All of my questions have been answered very promptly. I love that the app has foods already programmed in so figuring out carbs doesn't involve jumping from app to app. - Steven

  • "Can't say enough how great this is" ★★★★★

    I'll admit I was a little worried, but let me tell you: I love this app, these people, and this product. The customer service is top notch, as I have never had a bad interaction with them. I hope these guys keep their customer service as is and continue to develop this app because this is something special. - Dawn

  • "I love this!" ★★★★★

    Been using it for awhile and it really helps me keep my sugars on track. - Charles

  • "Convenient and great customer service" ★★★★★

    I really like this. It's convenient and tracks my numbers for me as well as what I eat. Customer service is really fast to respond and is very helpful. - Kendra

  • "Love this app" ★★★★★

    I really like that I can use my iPhone to read my sugar level. The fact that it stores it automatically on the app is especially helpful. The tips, advice, and encouraging messages are definitely a plus. Having the support team right in the palm of your hands and also available via email address with almost immediate response during the weekdays is very helpful. I would recommend this product and app to anyone looking for support controlling their diabetes! - Lindsay

  • "So easy!" ★★★★★

    Such an easy way to follow your blood sugars. Every time I have reached out for help someone has been quick to respond. Great quality device and staff. - Derick

Frequently Asked Questions

How accurate are Center Health meters?

The Center Health meters are some of the most accurate test strip sensors in the world.

The device was cleared by the FDA's latest 2017 blood glucose monitoring guidelines, and has an operating range of 20 mg/dL to 600 mg/dL (1.1 mmol/L to 33.3 mmol/L) with a hematocrit range of 20-70%.

As cited in the Center Health meter's FDA approval, for glucose concentrations less than 75 mg/dL, the Center Health sensor was within 15 mg/dL of the YSI reference value 100% of the time, within 10 mg/dL 98% of the time, and within 5 mg/dL 42% of the time. For concentrations above 75 mg/dL, the Center health meters were within 15% of the reference value 100% of the time, within 10% 95.5% of the time, and within 5% 52% of the time.

How are Center Health sensors able to achieve these results? Unlike normal test strips which only use one set of enzymes to measure blood sugar, the Center Health test strip has 2 sets of enzymes on every test strip. This allows for hematocrit interference to be measured and adjusted for during the 5 second blood sugar test, which enable the Center Health meters to compute extremely accurate results.

Do I need a prescription for Center Duo?

No, no prescription is needed for the Center Duo.

What phones are Center Health meters compatible with?

The Duo, Duo C and Nano meters support the following phones:

Duo (iPhone)

The Duo meter is compatible with iPhone 5, 6, 7, 8, X, 11, 12, 13 (including variants like the S, Plus, Max, and Pro) running iOS 11 and above.

Duo C (USB-C, Android Only)

The Duo C is compatible with any Android phone with a USB-C charging port running Android 6 and above.

Nano (Android headphone jack port)

For Android users, the Nano is compatible with the following (running Android 6 and above):

  • Samsung Galaxy S4, S5, S6, S6 Edge, S7, S7 Edge, S8, S8+, S9, S9+, S10, S10+
  • Samsung Galaxy Note 3, 4, 5, 6, 7, 8, 9, 10 (including "+" versions)
  • Samsung Galaxy A3, A5, A6, A7, A8, J5, J7
  • LG G3, G4, G5, G6, G7
  • Motorola Moto G7 Play
  • Sony Xperia XZs, XZ Premium, Z5 Premium
  • OPPO A39, R9s, F1s, R7Sf
  • Mi MI3
  • Huawei P9, P9 Lite, P10 Plus, Mate 9, Mate 9 Pro, Gr5, YS-2

Are finger prickers and lancets included in the subscription?

After purchasing your Center Health meter and test strips, you'll be offered the option to add on our lancing device (which includes 100 lancets) to your order for just $12.95 with free shipping!

Are Center Health meters covered by insurance?

No, the Center Health meters unfortunately aren't covered by insurance yet, unless you're using an FSA or HSA card!

Meanwhile, we've priced our subscriptions to be cheaper than an insurance copay. So whether you're paying out of pocket, or spending money on copays, Center Health is designed to save you money.

How much do Center Health meters cost?

The Center Health meters are $45 with the purchase of your first subscription!

And, it also comes with an infinite warranty. Yep, you read that right! That means that if your Center Health meter ever stops working, we'll replace it for free as long as you're a Center Health subscriber!

For extra meters and upgrades, there's a one-time charge of $30 for a new Duo or Duo C and $20 for a new Nano.

Is the unlimited test strip plan really unlimited?

Yes! It's simple: pay $29/month for unlimited test strips. With our unlimited strips membership, you will initially be sent 50 strips, and as the Center Health app detects you're running low, we automatically send you more, based on your usage!

And you can of course request more strips manually at any time. If there's ever a special circumstance and you would like additional strips in advance (for example if you're going to travel), just reach out to us and we'll take care of you!

How are Center Health test strips so cheap?

Blood glucose test strips have historically been incredibly expensive. At Center Health, we think diabetes is already hard enough, and shouldn't cost you an arm and a leg just to test your blood sugar. That's why we went directly to the blood glucose test strip manufacturers to bring you wholesale factory prices.

Center Health test strips are more accurate and of higher quality than most other expensive test strip brands. But because we sell directly from the factory, we're able to cut the middle-men which drive prices up to deliver you test strips at a much lower price!

What is your refund and cancellation policy?

If you've tried your Center Health device and are not satisfied for any reason, please get in touch within 30 days of purchase and we'll refund 100% of your money.

You may cancel at any point after the initial 30 days of purchase, in which case your subscription will remain active until your next billing date. Please note that we cannot process refunds once your strips for a given month have been dispatched, as the FDA legally doesn't allow us to take returns for safety reasons.

Before you resort to cancelling your account, we'd love to hear what you're struggling with. If you would like to chat or cancel your subscription, please get in touch with us via email.

Ready to make the change?

Join tens of thousands of people who've successfully controlled their blood sugar with Center Duo and Aria.

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Center Duo Test Strip Plan

Center Duo Test Strip Plan

Blood glucose meter + test strip subscription

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Already have a meter?

If you already have a blood sugar meter, choose from one of our Aria enabled programs below

Center CGM

Get an Aria-enabled continuous glucose monitor (CGM). As you use your CGM, Aria your AI health coach learns about your unique glucose levels and offers recommendations. No prior prescription needed.

Get Started with Center CGM

Diabetes, prediabetes, glucose control, weight loss, hypertension


Center+ is the app-only membership that lets you run Center and Aria on your own existing CGM.

Get Started with Center+

2x Better Than Human Coaching

Aria is cheaper and better than nutritionists, health coaches, and personal trainers.

Why? Because she can process more of your health data than humans ever could.

Aria is always learning about your unique biology to help you reach your goals. Aria helps most Center members lower their blood glucose levels 2x better than a human health coach within 4 months (1-2% A1C decrease (26-52mg/dL) with Aria versus ~1% A1C with human coaching).

97% of Aria insights are rated as helpful by patients, and 67% of subsequent blood sugars are improved.  

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