iHealth Track KN-550BT Review: The Cheapest Validated Monitor We Can Point To
By the BP Monitor Lab editorial team · Written from manufacturer documentation and published guidance, not from our own device testing · Last checked: August 30, 2026
This is the least expensive monitor on this site with a validation behind it. But almost every page that recommends it, including one of ours until this review was written, cites the wrong list and often the wrong model number. The evidence is real. It is just not where people say it is.
- Brand
- iHealth
- Model number
- KN-550BT
- Lifecycle
- Current
- Also sold as
- Sold as iHealth Track; model number KN-550BT
Independent validation: we can cite one
A listing or published study names this exact model.
It is listed on STRIDE BP. Listed on STRIDE BP. Mazoteras-Pardo published a general-population validation of this exact device, the KN-550BT, in 2019. NOT on the US validatedBP.org listing.
What Makes This One Different
Three names get tangled here and they are different products. The iHealth Track is the KN-550BT. The iHealth Ease is the BP3L. The device on the US validatedBP.org listing is neither of them: it is the BP7, a wrist monitor. What the Track has is an entry on STRIDE BP's validated device list and a general-population validation study of the KN-550BT published by Mazoteras-Pardo in 2019. That is genuine evidence for this exact device, and it is not the AMA listing that gets quoted.
Specifications
- Cuff
- 8.7 to 16.5 inches
- Stored users
- 1
- Readings per user on device
- 99
- App storage
- Unlimited via the app
- Syncing
- Bluetooth
- Rhythm
- Flags an irregular beat
- Typical price
- Under $50
Where the Evidence Actually Is
This matters more than it sounds. A reader who buys on the strength of "it is on validatedBP.org" and later checks will not find it, and will reasonably conclude they were misled. The honest version is more useful anyway: STRIDE BP is the European Society of Hypertension's list, it is broader than the US one, and a device on it with a published study behind it is well evidenced.
If you specifically want a device on the US listing, the A&D UA-651BLE is the cheapest we can point to there. Our validation guide explains why the two lists differ.
What the Lowest Price Here Buys, and What It Does Not
Ninety-nine readings on the device, which is more than the Omron Bronze and Silver hold, and unlimited history in the iHealth app. A large backlit display with colour-coded results against the standard categories. Heart rhythm disturbance detection, which is an irregular beat flag rather than AFib screening. Four AAA batteries and a wide-range cuff at 8.7 to 16.5 inches in the box.
One user. No AFib screening, no ECG, no Wi-Fi, and a companion app that is functional rather than polished. At this price those are reasonable omissions rather than defects.
Buy it if
- +Cost is the binding constraint and you still want evidence behind the device
- +You are the only user
- +You want a usable on-device memory without depending on an app
- +Your arm is 8.7 to 16.5 inches
Skip it if
- -You specifically want a device on the US validatedBP.org listing
- -Two or more people need their own histories
- -You want AFib screening or an ECG
- -You want a polished app experience, which is not what this price buys
Closest Alternatives
| Model | Cuff | Users | Rhythm | Validation | Price |
|---|---|---|---|---|---|
| A&D Medical UA-651BLE UA-651BLE | 9 to 14.6 inches | 1 | Flags an irregular beat | Cited | $50 to $100 |
| Omron Iron BP5000 | 9 to 17 inches | 1 | Flags an irregular beat | Cited | Under $50 |
| Omron Bronze BP5150 | 9 to 17 inches | 1 | Flags an irregular beat | Cited | Under $50 |
The UA-651BLE is the cheapest device we can point to on the US listing. The Omron Iron is validated with no app at all. The Bronze syncs but holds only fourteen readings.
We earn a commission if you buy through this link. It costs you nothing extra.
Check the iHealth Track on AmazonEvidence record
Every fact on this page comes from this record. It is the same record that fills the comparison table, so the two can never disagree.
| Brand | iHealth |
|---|---|
| Exact model | KN-550BT |
| Lifecycle | Current |
| Included cuff | 8.7 to 16.5 inches |
| Rhythm | Flags an irregular beat |
| Stored users | 1 |
| Readings per user on device | 99 |
| Syncing | Bluetooth |
| Averaging | No, average your own readings |
| Power | 4 x AAA alkaline |
| Independent validation | We can cite a listing or study for this exact model |
| What the maker publishes | It is listed on STRIDE BP. Listed on STRIDE BP. Mazoteras-Pardo published a general-population validation of this exact device, the KN-550BT, in 2019. NOT on the US validatedBP.org listing. |
| FDA clearance | Not confirmed by us in the FDA database |
| Retail ASIN | B01C5QS1T8 |
| Typical price | Under $50 |
| Facts rechecked | 2026-08-31 |
Frequently Asked Questions
Is the iHealth Track on validatedBP.org?
No. The only iHealth device on the US validatedBP.org listing is the BP7 wrist monitor. The Track is on STRIDE BP's validated list, and a general-population validation of this exact device, the KN-550BT, was published by Mazoteras-Pardo in 2019.
Is the iHealth Track the same as the BP3L?
No. BP3L is the iHealth Ease, a different product. The Track is the KN-550BT. The two are frequently conflated, including in pages that recommend one and link the other.
How many readings does it store?
Ninety-nine on the device for one user, and unlimited in the iHealth app. That on-device figure is higher than several Omron monitors costing twice as much.
Does it detect atrial fibrillation?
No. It flags heart rhythm disturbances, which is an irregular beat signal. It does not identify atrial fibrillation by name and does not record a trace.
Sources
- -iHealth Track product listing and specifications (source)
- -STRIDE BP validated device list (source)
- -Mazoteras-Pardo et al., validation of the iHealth Track (KN-550BT), 2019 (source)