# NM HRV vs BioSignals Personal trainer

The clearest difference is update cadence: NM HRV at fortnightly against BioSignals Personal trainer's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NM HRV ships an update fortnightly, BioSignals Personal trainer every 5 months. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | NM HRV | BioSignals Personal trainer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 months |
| Size | 85 MB | 28 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Fourthfrontier](https://appshunter.io/developer/1331846764) | [BioSignals LIMITED](https://appshunter.io/developer/1756021697) |

## What reviewers say

### NM HRV

[App page](https://appshunter.io/ios/app/nm-hrv/id6450173490)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### BioSignals Personal trainer

[App page](https://appshunter.io/ios/app/biosignals-personal-trainer/id6523415317)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NM HRV free?

NM HRV is free to download, with no in-app purchases.

### Is BioSignals Personal trainer free?

BioSignals Personal trainer is free to download, with no in-app purchases.

### Do NM HRV or BioSignals Personal trainer have ads?

Neither NM HRV nor BioSignals Personal trainer shows ads.

### Which is updated more often, NM HRV or BioSignals Personal trainer?

NM HRV ships an update fortnightly, and BioSignals Personal trainer every 5 months. Most recently, NM HRV was updated on October 3, 2026 and BioSignals Personal trainer on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*