# Cardio Chart vs HeartRateHub

The clearest difference is in-app purchases: Cardio Chart at none against HeartRateHub's 3. HeartRateHub's advantage is update cadence (every 4 months vs every 25 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HeartRateHub sells 3 in-app purchases, starting at $1.99 per 7 days. Cardio Chart asks for nothing beyond the download.

Cardio Chart ships an update every 25 months, HeartRateHub every 4 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Cardio Chart | HeartRateHub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cardio-chart/id1180616397/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 0 MB | 7 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Clever Armadillo LLC](https://appshunter.io/developer/570999114) | [Enzer Erkin](https://appshunter.io/developer/1545061957) |

## What reviewers say

### Cardio Chart

[App page](https://appshunter.io/ios/app/cardio-chart/id1180616397)

Visualize your heart rate during workouts with detailed graphs. Track maximum and average heart rates to understand exercise impact. Requires heart rate data recorded to the Health app.

**Highlights:** Heart rate workout graphs, Maximum heart rate display, Average heart rate display, Health app integration, Workout data visualization

**In-app purchases:** none


### HeartRateHub

[App page](https://appshunter.io/ios/app/heartratehub/id6477622582)

This app helps runners train smarter by utilizing personalized heart rate zones. It integrates with Apple Watch to provide real-time feedback and allows for the creation of custom or pre-set interval workouts for improved endurance and speed.

**Highlights:** Custom heart rate zone creation, Flexible interval workout design, Predefined zone templates, Apple Watch real-time feedback, Speedometer-style visual display, Data-driven goal-oriented sessions

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly Subscription | $3.99 | per month |
| Yearly Subscription | $24.99 | per year |


## Frequently asked questions

### Is Cardio Chart free?

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

### Is HeartRateHub free?

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

### Do Cardio Chart or HeartRateHub have ads?

Neither Cardio Chart nor HeartRateHub shows ads.

### Which is updated more often, Cardio Chart or HeartRateHub?

Cardio Chart ships an update every 25 months, and HeartRateHub every 4 months. Most recently, Cardio Chart was updated on November 2, 2026 and HeartRateHub on November 4, 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.*