# Fourth Frontier Frontier X2 vs SonoHealth EKGraph Portable EKG Monitor: specs and price compared

A sourced, side-by-side comparison of the Fourth Frontier Frontier X2 (Fourth Frontier) and SonoHealth EKGraph Portable EKG Monitor (SonoHealth) among portable ecg monitors. SonoHealth EKGraph Portable EKG Monitor is the cheaper of the two at $79.

## Side by side

| Spec | Fourth Frontier Frontier X2 | SonoHealth EKGraph Portable EKG Monitor |
| --- | --- | --- |
| US price | $579 | $79 |
| Brand | Fourth Frontier | SonoHealth |
| Leads | 1 (continuous single-lead ECG resembling the V5 12-lead position) | 1 (selectable Lead I or Lead II) |
| Recording duration | Up to 24 hours of continuous ECG recording per session | 30 seconds |
| Afib detection | — | Yes |
| Fda clearance | FDA 510(k) cleared (device itself is marketed as wellness, not diagnostic, per its own disclaimer) | FDA 510(k)-cleared |
| Bluetooth | Yes | Yes |
| Display | None; chest-strap wearable with no on-device screen, data reviewed via app/web dashboard | Built-in LCD with instant on-device classification |
| Onboard storage | Onboard memory chip records data with no phone connection required, described as 'zero data loss' | — |
| Battery | Up to 14 days on typical use (~1 hour of ECG recording per day) | — |
| Companion app | Frontier X app (live dashboards, trends, workout history) plus a web dashboard | SonoHealth app (iOS/Android) with free unlimited cloud storage and PDF report export |

## Key differences

- Leads: Fourth Frontier Frontier X2 1 (continuous single-lead ECG resembling the V5 12-lead position) vs SonoHealth EKGraph Portable EKG Monitor 1 (selectable Lead I or Lead II)
- Recording duration: Fourth Frontier Frontier X2 Up to 24 hours of continuous ECG recording per session vs SonoHealth EKGraph Portable EKG Monitor 30 seconds
- Fda clearance: Fourth Frontier Frontier X2 FDA 510(k) cleared (device itself is marketed as wellness, not diagnostic, per its own disclaimer) vs SonoHealth EKGraph Portable EKG Monitor FDA 510(k)-cleared
- Display: Fourth Frontier Frontier X2 None; chest-strap wearable with no on-device screen, data reviewed via app/web dashboard vs SonoHealth EKGraph Portable EKG Monitor Built-in LCD with instant on-device classification
- Companion app: Fourth Frontier Frontier X2 Frontier X app (live dashboards, trends, workout history) plus a web dashboard vs SonoHealth EKGraph Portable EKG Monitor SonoHealth app (iOS/Android) with free unlimited cloud storage and PDF report export

## Sources

- Fourth Frontier Frontier X2: https://fourthfrontier.com/products/frontier-x (fourthfrontier.com, verified 2026-08-05)
- SonoHealth EKGraph Portable EKG Monitor: https://sonohealth.com/products/ekgraph-portable-ekg-monitor-detect-afib-abnormalities (sonohealth.com, verified 2026-08-05)

Canonical: https://frontdeskreview.com/gear/portable-ecg-monitors/fourthfrontier-frontier-x2-vs-sonohealth-ekgraph/
Cite: Per The Front Desk Review, Fourth Frontier Frontier X2 ($579) vs SonoHealth EKGraph Portable EKG Monitor ($79) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/portable-ecg-monitors/fourthfrontier-frontier-x2-vs-sonohealth-ekgraph/
License: CC BY 4.0.