# HRV Watch vs CalmTide

The clearest difference is price: CalmTide at Free against HRV Watch's $0.99. HRV Watch's advantage is in-app purchases (none vs 3) and iOS requirement (17.0 vs 26.0). On update cadence, ads and device support there is nothing between them.

CalmTide is free to download; HRV Watch costs $0.99 up front. CalmTide sells 3 in-app purchases, starting at $4.99 per month. HRV Watch asks for nothing beyond the download.

HRV Watch ships an update every 2 weeks, CalmTide every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HRV Watch | CalmTide |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hrv-watch/id6759614107/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Paid | — |
| Size | 58 MB | 10 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [钰斌 唐](https://appshunter.io/developer/1868318339) | [Michael Smith](https://appshunter.io/developer/1893971383) |

## What reviewers say

### HRV Watch

[App page](https://appshunter.io/ios/app/hrv-watch/id6759614107)

Understand your stress, heart rate, and recovery with this app that uses Apple Watch and Health app data. Visualize trends with customizable themes and heatmaps for a clearer picture of your well-being.

**Highlights:** HRV and recovery trends, Real-time and historical heart rate, Stress insights and yearly heatmap, Customizable visual themes, Steps and sleep tracking, Apple Watch integration, Widgets and complications

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases:** none


### CalmTide

[App page](https://appshunter.io/ios/app/calmtide-cortisol-tracker/id6776101012)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $29.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is HRV Watch free?

HRV Watch costs $0.99, with no in-app purchases.

### Is CalmTide free?

CalmTide is free to download, with in-app purchases available.

### Do HRV Watch or CalmTide have ads?

Neither HRV Watch nor CalmTide shows ads.

### Which is updated more often, HRV Watch or CalmTide?

HRV Watch ships an update every 2 weeks, and CalmTide every 3 weeks. Most recently, HRV Watch was updated on November 5, 2026 and CalmTide 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.*