# QardioArm A100 vs iHealth Track KN-550BT: specs and price compared

A sourced, side-by-side comparison of the QardioArm A100 (Qardio) and iHealth Track KN-550BT (iHealth) among blood pressure monitors. iHealth Track KN-550BT is the cheaper of the two at $39.99.

## Side by side

| Spec | QardioArm A100 | iHealth Track KN-550BT |
| --- | --- | --- |
| US price | $99.95 | $39.99 |
| Brand | Qardio | iHealth |
| Released | — | 2016 |
| Type | upper_arm | upper_arm |
| Cuff range (in) | 8.7–14.6 in | 8.6–18.9 in |
| Memory readings | — | 99 |
| User profiles | — | 1 |
| Bluetooth app | Yes | Yes |
| Irregular heartbeat detection | Yes | Yes |
| Clinically validated | Yes | Yes |

## Key differences

- Cuff range (in): QardioArm A100 8.7–14.6 in vs iHealth Track KN-550BT 8.6–18.9 in

## What reviewers say

**QardioArm A100** — Only one whitelisted tester with a readable hands-on page covered the QardioArm: TechRadar's 2015 iPhone-Health walkthrough, which found it easy to use with a convenient one-piece design and an optional triple-averaged reading mode. No accuracy benchmarks were published. (1 sourced review.)

**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.)

## Sources

- QardioArm A100: https://medgrade.org/devices/qardioarm-a100/ (medgrade.org, verified 2026-06-19)
- iHealth Track KN-550BT: https://medgrade.org/reviews/ihealth-track-kn-550bt-review/ (medgrade.org, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/blood-pressure-monitors/qardioarm-a100-vs-ihealth-track-kn-550bt/
Cite: Per The Front Desk Review, QardioArm A100 ($99.95) vs iHealth Track KN-550BT ($39.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/blood-pressure-monitors/qardioarm-a100-vs-ihealth-track-kn-550bt/
License: CC BY 4.0.