# CanTone vs HRV Screening：早期檢測先導計劃

The clearest difference is update cadence: CanTone at every 3 weeks against HRV Screening：早期檢測先導計劃's every 4 months. CanTone also leads on iOS requirement (15.0 vs 18.1). 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.

CanTone ships an update every 3 weeks, HRV Screening：早期檢測先導計劃 every 4 months. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | CanTone | HRV Screening：早期檢測先導計劃 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 189 MB | 9 MB |
| Requires iOS | **15.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Itchi Technology Limited](https://appshunter.io/developer/1456708978) | [College of Professional and Continuing Education Limited](https://appshunter.io/developer/924358949) |

## What reviewers say

### CanTone

[App page](https://appshunter.io/ios/app/cantone/id6446193535)

**Features:** macOS Compatibility

**In-app purchases:** none


### HRV Screening：早期檢測先導計劃

[App page](https://appshunter.io/ios/app/hrv-screening/id6753956332)

**In-app purchases:** none


## Frequently asked questions

### Is CanTone free?

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

### Is HRV Screening：早期檢測先導計劃 free?

HRV Screening：早期檢測先導計劃 is free to download, with no in-app purchases.

### Do CanTone or HRV Screening：早期檢測先導計劃 have ads?

Neither CanTone nor HRV Screening：早期檢測先導計劃 shows ads.

### Which is updated more often, CanTone or HRV Screening：早期檢測先導計劃?

CanTone ships an update every 3 weeks, and HRV Screening：早期檢測先導計劃 every 4 months. Most recently, CanTone was updated on September 24, 2026 and HRV Screening：早期檢測先導計劃 on September 25, 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.*