# AliveCor KardiaMobile vs Fourth Frontier Frontier X2: specs and price compared

A sourced, side-by-side comparison of the AliveCor KardiaMobile (AliveCor) and Fourth Frontier Frontier X2 (Fourth Frontier) among portable ecg monitors. AliveCor KardiaMobile is the cheaper of the two at $79.

## Side by side

| Spec | AliveCor KardiaMobile | Fourth Frontier Frontier X2 |
| --- | --- | --- |
| US price | $79 | $579 |
| Brand | AliveCor | Fourth Frontier |
| Leads | 1 | 1 (continuous single-lead ECG resembling the V5 12-lead position) |
| Recording duration | 30 seconds | Up to 24 hours of continuous ECG recording per session |
| Afib detection | Yes | — |
| Fda clearance | FDA-cleared to detect AFib, bradycardia, tachycardia, and normal sinus rhythm | FDA 510(k) cleared (device itself is marketed as wellness, not diagnostic, per its own disclaimer) |
| Bluetooth | No | Yes |
| Display | None on device; results shown live in the Kardia smartphone app | None; chest-strap wearable with no on-device screen, data reviewed via app/web dashboard |
| Onboard storage | — | Onboard memory chip records data with no phone connection required, described as 'zero data loss' |
| Battery | 1x CR2016 coin-cell (manufacturer-rated ~15 months of typical use, per AliveCor support documentation) | Up to 14 days on typical use (~1 hour of ECG recording per day) |
| Companion app | Kardia app (iOS/Android) | Frontier X app (live dashboards, trends, workout history) plus a web dashboard |

## Key differences

- Leads: AliveCor KardiaMobile 1 vs Fourth Frontier Frontier X2 1 (continuous single-lead ECG resembling the V5 12-lead position)
- Recording duration: AliveCor KardiaMobile 30 seconds vs Fourth Frontier Frontier X2 Up to 24 hours of continuous ECG recording per session
- Fda clearance: AliveCor KardiaMobile FDA-cleared to detect AFib, bradycardia, tachycardia, and normal sinus rhythm vs Fourth Frontier Frontier X2 FDA 510(k) cleared (device itself is marketed as wellness, not diagnostic, per its own disclaimer)
- Bluetooth: AliveCor KardiaMobile No vs Fourth Frontier Frontier X2 Yes
- Display: AliveCor KardiaMobile None on device; results shown live in the Kardia smartphone app vs Fourth Frontier Frontier X2 None; chest-strap wearable with no on-device screen, data reviewed via app/web dashboard
- Battery: AliveCor KardiaMobile 1x CR2016 coin-cell (manufacturer-rated ~15 months of typical use, per AliveCor support documentation) vs Fourth Frontier Frontier X2 Up to 14 days on typical use (~1 hour of ECG recording per day)
- Companion app: AliveCor KardiaMobile Kardia app (iOS/Android) vs Fourth Frontier Frontier X2 Frontier X app (live dashboards, trends, workout history) plus a web dashboard

## Sources

- AliveCor KardiaMobile: https://kardia.com/products/kardiamobile (kardia.com, verified 2026-08-05)
- Fourth Frontier Frontier X2: https://fourthfrontier.com/products/frontier-x (fourthfrontier.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/portable-ecg-monitors/alivecor-kardiamobile-vs-fourthfrontier-frontier-x2/
Cite: Per The Front Desk Review, AliveCor KardiaMobile ($79) vs Fourth Frontier Frontier X2 ($579) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/portable-ecg-monitors/alivecor-kardiamobile-vs-fourthfrontier-frontier-x2/
License: CC BY 4.0.