iHealth Track KN-550BT Review: Listed by Model, Under $50
By the BP Monitor Lab editorial team · Written from manufacturer documentation and published guidance, not from our own device testing · Updated: October 6, 2026 · Sources last checked: August 30, 2026
This is a monitor under $50 with a validation behind it. It is listed by model on the US validated device listing, and there is a published study of this exact device. The model number matters, because iHealth sells several monitors with similar names.
- 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 by model on the US Blood Pressure Validated Device Listing. It is listed on STRIDE BP. Mazoteras-Pardo published a general-population validation of this exact device, the KN-550BT, in 2019.
What Makes This One Different
Two names get tangled here and they are different products. The iHealth Track is the KN-550BT. The iHealth Ease is the BP3L. The Track is on the US Blood Pressure Validated Device Listing as iHealth Track Blood Pressure Monitor (KN-550BT). It is also on STRIDE BP's validated device list, and Mazoteras-Pardo published a general-population validation study of the KN-550BT in 2019.
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 Is
We used to say the Track was not on the US listing. That was wrong. On October 6, 2026 we opened its entry on the listing, and it is there under its model number, KN-550BT. A listing covers one exact model, so match the number on the box.
If two or more people need their own history, the four-user A&D UA-767F is on the US listing too, one price band up. Our validation guide explains how the US listing and STRIDE BP differ.
What a Price Under $50 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
- -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 on the US listing and costs more. The Omron Iron is validated with no app at all. The Bronze syncs but holds only fourteen readings.
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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 by model on the US Blood Pressure Validated Device Listing. It is listed on STRIDE BP. Mazoteras-Pardo published a general-population validation of this exact device, the KN-550BT, in 2019. |
| FDA clearance | Not confirmed by us in the FDA database |
| Retail ASIN | B01C5QS1T8 |
| Typical price | Under $50 |
| Facts rechecked | 2026-08-31 |
Fact-check history
What we have corrected on this page, and when. We publish the mistakes as well as the fixes.
- 2026-10-06: Corrected a false claim. The page said the iHealth Track is not on the US validated device listing and that the only iHealth device listed is the BP7 wrist monitor. We opened the listing on 2026-10-06: the Track is listed by model as iHealth Track Blood Pressure Monitor (KN-550BT). The title, heading and text now say so, and the listing entry is linked.
- 2026-10-05: Removed the cheapest validated claim from the title, heading and text. On 2026-10-05 the Omron Iron BP5000 cost less on Amazon, and Omron publishes a validation for it.
- 2026-10-04: Replaced a catch line about build and app quality, which read as if we had handled the monitor, with one the record supports: one user, and listed on STRIDE BP rather than the US listing.
Frequently Asked Questions
Is the iHealth Track on the US validated device listing?
Yes, by model. It appears on the US Blood Pressure Validated Device Listing as iHealth Track Blood Pressure Monitor (KN-550BT), with a 22 to 42 cm cuff. It is also on STRIDE BP's validated list, and a general-population validation of this exact device 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)
- -US Blood Pressure Validated Device Listing, iHealth Track (KN-550BT) entry (source)
- -STRIDE BP validated device list (source)
- -Mazoteras-Pardo et al., validation of the iHealth Track (KN-550BT), 2019 (source)