# HRV4Biofeedback vs PickX

The clearest difference is price: PickX at Free against HRV4Biofeedback's $9.99. HRV4Biofeedback's advantage is chart position (#26 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

PickX is free to download; HRV4Biofeedback costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HRV4Biofeedback | PickX |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[3.4 (30 ratings)](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613/reviews)** | — |
| Number of ratings | **30** | — |
| Positive reviews | 53.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Best chart rank | **#26** | — |
| Size | 138 MB | 28 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Juon Kawakami](https://appshunter.io/developer/1759914202) |

## What reviewers say

### HRV4Biofeedback

[App page](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613)

**Currently charting:** #26 Top Paid · Lifestyle (US App Store)

This app uses your phone's camera to measure heart rate variability and provide biofeedback. It guides you through deep breathing exercises to improve self-regulation and manage stress. Track your progress and explore correlations with your daily experiences.

**Highlights:** Camera-based HRV measurement, Real-time heart rate feedback, Resonant frequency analysis, Biofeedback score, Subjective annotations, HealthKit integration, Bluetooth sensor support

**Features:** Vision Pro support

**In-app purchases:** none


### PickX

[App page](https://appshunter.io/ios/app/pickx-notion-db-picker/id6758036211)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HRV4Biofeedback free?

HRV4Biofeedback costs $9.99, with no in-app purchases.

### Is PickX free?

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

### Do HRV4Biofeedback or PickX have ads?

Neither HRV4Biofeedback nor PickX shows ads.

### Which is updated more often, HRV4Biofeedback or PickX?

HRV4Biofeedback ships an update every 2 months, and PickX every 2 months. Most recently, HRV4Biofeedback was updated on November 3, 2026 and PickX 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.*