How the Cardiowell blood pressure monitor works

You press one button. The monitor sends the reading over a cellular connection. The person registered to the device sees it in a secure portal.

There is no app to download, no Bluetooth pairing, and no password to remember on the monitor's side.

Buy on cardiowell.com Buy on Amazon

A smiling woman sits at a table with a black Cardiowell blood pressure monitor and cuff in front of her.

The short version

1. Set upThe monitor is registered to one cell phone number. That number belongs to the person who will see the readings.

2. Take a readingWrap the cuff on the upper arm, sit still, and press Start/Stop.

3. See itThe reading appears on the monitor's screen and goes to your secure portal. You get a text with a link to it.

Step 1: Register the monitor to a cell number

Each monitor is registered to one cell phone number. That number receives the readings, the portal link, and texts with BP Buddy.

Ordering from cardiowell.com. Enter your cell phone number at checkout. We register the monitor to it before it ships. If you are ordering for a parent, use your own number, and the readings come to you.

Ordering from Amazon. When the monitor arrives, scan the QR code in the box with a phone and type in the cell number that should receive the readings. If you bought it for a parent, your parent scans the code and types in your number.

A hand holds a phone and scans the QR code on the open Cardiowell box.

The quick set-up guide walks through registration and the first reading, step by step.

Step 2: Take a reading

Sit with your back supported and your feet flat on the floor. Rest for five minutes.
Put the cuff on your bare upper arm, and rest the arm on a table at heart level.
Press Start/Stop. Stay still and don't talk while the cuff inflates.
Read the result on the screen.

A woman sits at a table with the Cardiowell cuff on her upper arm and the black monitor in front of her.

Every monitor comes with the Extended Adult cuff, which fits an upper arm 22 to 45 centimeters (9 to 18 inches) around. Two other sizes are sold separately for $25 each, so measure your upper arm before you order.

Cuff sizes

Measure around the middle of your bare upper arm with a soft tape, halfway between the shoulder and the elbow.

Cuff	Arm circumference	Who it is for	Where it comes from
Extended Adult Cuff (BT194)	22 to 45 cm (9 to 18 in)	General adults. Also the only cuff listed for pregnancy.	Included in every box. Also sold separately, $25
Child's Cuff (BT192)	16 to 36 cm (6 to 14 in)	Children (the only cuff listed for children). Also listed for general adults with smaller arms.	Sold separately, $25
Large Cuff (BT193)	40 to 52 cm (16 to 20 in)	General adults with larger arms	Sold separately, $25

The validation listing covers children with the 16 to 36 cm (6 to 14 in) cuff only, and pregnancy with the 22 to 45 cm (9 to 18 in) cuff only. Cuffs are sold on cardiowell.com, not on Amazon.

Buy a cuff

Step 3: The reading reaches you

The monitor has its own cellular connection. It does not need Wi-Fi, a smartphone nearby, or a Bluetooth connection. Your parent can press the button with no phone in the house, and the reading still gets to you.

A black Cardiowell monitor showing a reading next to a phone showing the blood pressure measurements portal.

The portal shows:

Each reading with its date and time
Graphs and statistics over time
Notifications

You open the portal from a secure link sent by text. The link stays valid until you open it from a new device. When you do, a new link is sent automatically to the cell number registered to the monitor.

BP Buddy

BP Buddy is an AI assistant you reach by text message. Ask it about a reading, and it answers. It does not diagnose, and it does not replace your doctor.

Sharing with a doctor or family

Anyone with access to the portal can send a PDF report to anyone else. People use this to send a month of readings to a doctor before an appointment, or to a sibling.

One cell number is registered to each monitor. To change the registered number, open the Cardiowell app from the link in your text message and go to your profile settings.

Accuracy and clearance

510(k) cleared, ages 3 and older.
Listed on the ValidateBP validated device list as the Cardiowell Cellular Blood Pressure Monitor (BT107), validated to ISO 81060-2:2018/AMD1:2020. The listing covers general adults with all three cuff sizes: 16 to 36 cm (6 to 14 in), 22 to 45 cm (9 to 18 in), and 40 to 52 cm (16 to 20 in). For children, use only the 16 to 36 cm cuff. For pregnancy, use only the 22 to 45 cm cuff.
A home monitor does not replace a visit with a doctor. Take your readings and your questions to your appointment.

See the ValidateBP listing

What it costs

$165 for the monitor on cardiowell.com (regular price $180).
No subscription fee for the first year. That covers the cellular connection, the portal, PDF reports, and BP Buddy.
After the first year, Connected Care is $8 per month. We remind you before the year ends. You are never charged without your approval, and you can cancel or pause any time.
If you don't renew, the monitor still takes your blood pressure and shows the result on its screen. You lose access to the history and analysis, and to BP Buddy.
HSA and FSA eligible.

Questions people ask

Does my parent need a smartphone?

No. Your parent presses one button. The monitor sends the reading over its own cellular connection.

Does it need Wi-Fi or Bluetooth?

No. The monitor uses a built-in cellular connection.

Who can see the readings?

The person whose cell number is registered to the monitor. They can send PDF reports to anyone.

I bought it on Amazon. How do I register it?

Scan the QR code in the box, and type in the cell number that should receive the readings.

I'm ordering for my parent. Whose number do I use?

Yours. On cardiowell.com, give us your number at checkout, and we register the monitor before it ships.

Can I change the registered number later?

Yes. Open the Cardiowell app from the link in your text message and change the number in your profile settings.

My link stopped working. What do I do?

The link stays valid until you open it from a new device. A new link is then sent automatically to the registered cell number.

How long does shipping take?

Orders from cardiowell.com ship by USPS. Delivery takes 2 to 5 days, depending on location.

Is BP Buddy a doctor?

No. It is an AI assistant. It does not diagnose or replace medical care.

What happens if I stop paying the subscription?

The monitor still takes and displays readings. History, analysis, and BP Buddy turn off.

Is it FDA approved?

The monitor is 510(k) cleared for ages 3 and older.

How do I know it's accurate?

It is on the ValidateBP validated device list. Home readings can vary with technique, so follow the steps above.

What size cuff do I need?

Measure around your bare upper arm. The cuff in the box fits 22 to 45 cm (9 to 18 inches). The Child's Cuff (BT192, 16 to 36 cm, 6 to 14 inches) and the Large Cuff (BT193, 40 to 52 cm, 16 to 20 inches) are sold separately. Each cuff is $25, and so is an extra Extended Adult Cuff (BT194).

Can a child or a pregnant person use it?

The monitor is 510(k) cleared for ages 3 and older. The ValidateBP listing covers children with the 16 to 36 cm cuff only, and pregnancy with the 22 to 45 cm cuff only. Ask your doctor first.

What if I have a problem?

Email support@cardiowell.com.

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