S vs NM HRV
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
S
Read full descriptionHide full description
The S-Patch Medi is an app that manages the status of S-Patch devices and any ongoing ECG tests. Key feature of the S-Patch Medi App: - Manage ECG test for a particular S-Patch device - Send completed ECG recording for analysis Jurisdiction Statement: S-Patch currently has regulatory clearance in the following region(s): South Korea. The use of S-Patch is to be prescribed and interpreted only by the accredited physicians or healthcare providers from these regions, or any institutions that are conducting a clinical research with a formal IRB (Institutional Review Board) approval. The users shall confirm the product regulatory status with their provider.
NM HRV
Read full descriptionHide full description
This application allows you to connect with and use Frontier X - a revolutionary new wearable device that monitors your lungs and heart. Once you download this application on your iPhone, this will allow you to view your real-time data if you exercise with the Frontier X device. In order to use this application, you need to have the Frontier X device, available at fourthfrontier.com. Frontier X integrates with HealthKit to export your Frontier X activities into the Health app and to read heart rate and biometric data. The Frontier X is a chest-worn device that has the following features: Suitable for recording during Rest, Sleep and Activity. Real-time vibration alerts when you cross your Heart Rate thresholds Easy to use. Strap on and start. Sync later View quick activity summary on device screen Highly accurate Heart Rate data Apps available for iOS. IP67 Waterproof up to 1.5 M Battery: 14+ days of typical use, up to 24-hrs continuous use
Screenshots
Verdict
The clearest difference is update cadence: NM HRV at fortnightly against S's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
S ships an update every 2 months, NM HRV fortnightly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.
| Parameter | S | NM HRV |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Fortnightly โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPod |
| Requires iOS | 15.1 โ better | 15.5 |
| Further details โ not scored | ||
| Size | 34 MB | 85 MB |
| Age rating | 12+ | 12+ |
| Developer | Wellysis Corp. | Fourthfrontier |
In-app purchases
S
No in-app purchases
NM HRV
No in-app purchases









