# Heart Rate Variability + vs Boltt

The clearest difference is in-app purchases: Boltt at none against Heart Rate Variability +'s 5. Boltt also leads on update cadence (monthly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Heart Rate Variability + sells 5 in-app purchases, starting at $4.99 per 7 days. Boltt asks for nothing beyond the download.

Heart Rate Variability + ships an update every 4 months, Boltt monthly. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Heart Rate Variability + | Boltt |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 54 MB | 62 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MD SOFTWARE SERVICES LTD](https://appshunter.io/developer/1843392499) | [Boltt Pty Ltd](https://appshunter.io/developer/1894156477) |

## What reviewers say

### Heart Rate Variability +

[App page](https://appshunter.io/ios/app/heart-rate-variability-plus/id6753306246)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly-Trial | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


### Boltt

[App page](https://appshunter.io/ios/app/boltt/id6762442417)

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

**In-app purchases:** none


## Frequently asked questions

### Is Heart Rate Variability + free?

Heart Rate Variability + is free to download, with in-app purchases available.

### Is Boltt free?

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

### Do Heart Rate Variability + or Boltt have ads?

Neither Heart Rate Variability + nor Boltt shows ads.

### Which is updated more often, Heart Rate Variability + or Boltt?

Heart Rate Variability + ships an update every 4 months, and Boltt monthly. Most recently, Heart Rate Variability + was updated on October 25, 2026 and Boltt on October 31, 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.*