A&D Medical
A&D Medical UA-651BLE
$69.99
Best Blood Pressure Monitors · head-to-head
A&D Medical UA-651BLE vs iHealth Track KN-550BT
A sourced, side-by-side comparison. iHealth Track KN-550BT is cheaper at $39.99. Every spec and price links to its source.
iHealth
iHealth Track KN-550BT
$39.99Cheaper
Released 2016
Which is better: the A&D Medical UA-651BLE or iHealth Track KN-550BT?
On the specs we track, they're closely matched. The iHealth Track KN-550BT is the cheaper at $39.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | A&D Medical UA-651BLE | iHealth Track KN-550BT |
|---|---|---|
| US price | $69.99 | $39.99 |
| Brand | A&D Medical | iHealth |
| Released | — | 2016 |
| Type | upper_arm | upper_arm |
| Cuff range (in) | 8.6–16.5 in | 8.6–18.9 in |
| Memory readings | 30 | 99 |
| User profiles | 1 | 1 |
| Bluetooth app | Yes | Yes |
| Irregular heartbeat detection | Yes | Yes |
| Clinically validated | Yes | Yes |
| Release | — | 2016 |
Sources — A&D Medical UA-651BLE: medical.andonline.com (verified 2026-06-19). iHealth Track KN-550BT: medgrade.org (verified 2026-06-19).
What's the difference between the A&D Medical UA-651BLE and iHealth Track KN-550BT?
Where the two actually differ on the specs we track (2 of 7). Matching specs are omitted.
- Cuff range (in): A&D Medical UA-651BLE 8.6–16.5 in vs iHealth Track KN-550BT 8.6–18.9 in
- Memory readings: A&D Medical UA-651BLE 30 vs iHealth Track KN-550BT 99
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
A&D Medical UA-651BLE
A single whitelisted source covers the UA-651BLE: Wirecutter's February 2026 home blood-pressure-monitor guide mentions it only briefly in its competition section, calling it 'a nice machine' but passing it over for lacking a backlit display and often being out of stock. The guide as a whole is based on panel testing of over two dozen monitors, but the article does not explicitly document hands-on test data for this specific model, and no whitelisted lab measurements exist — this consensus rests on one brief mention from one source. (1 sourced review.)
Praised: Called 'a nice machine' by Wirecutter — it is the Bluetooth version of the A&D UA-767F, which the same guide rates a dependable machine.
Flagged: No backlit display, making readings harder to see in dim rooms; Often out of stock at retailers.
iHealth Track KN-550BT
Thin coverage: only Wirecutter's fetchable text covers this exact model, and it is negative — in hands-on testing the iHealth Track "produced inconsistent readings in our tests," so it missed their picks. TechGearLab's page was unreachable during harvest, and Consumer Reports, Forbes Health, and MedGrade fall outside the genuine-tester whitelist. Treat this single-source verdict cautiously. (1 sourced review, 1 lab-tested.)
Flagged: Inconsistent readings in Wirecutter's hands-on testing kept it out of their recommended picks.