# Cardio Chart vs ZenWorkout

The clearest difference is in-app purchases: Cardio Chart at none against ZenWorkout's 1. Cardio Chart also leads on ads (none vs shown). ZenWorkout's advantage is update cadence (daily vs every 25 months) and iOS requirement (13.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. ZenWorkout sells 1 in-app purchase, starting at $0.99 per month. Cardio Chart asks for nothing beyond the download.

Cardio Chart ships an update every 25 months, ZenWorkout daily. The most recent releases landed on July 4, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Cardio Chart | ZenWorkout |
| --- | --- | --- |
| 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** | Yes |
| Update frequency | Every 25 months | **Daily** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 0 MB | 30 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Clever Armadillo LLC](https://appshunter.io/developer/570999114) | [Greg Gage](https://appshunter.io/developer/1841050301) |

## 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


### ZenWorkout

[App page](https://appshunter.io/ios/app/zenworkout/id6752798806)

Design custom HIIT and interval workouts with flexible timers, repeating groups, and untimed steps. Share your plans, sync across devices, and control your training with voice commands. Enjoy seamless audio playback over your music.

**Highlights:** Customizable workout design, Repeating exercise groups, Untimed workout steps, Workout sharing via links, Cloud sync across devices, Voice command control, Text-to-speech announcements

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZenWorkout Premium | $0.99 | per month |


## Frequently asked questions

### Is Cardio Chart free?

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

### Is ZenWorkout free?

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

### Do Cardio Chart or ZenWorkout have ads?

ZenWorkout shows ads; Cardio Chart does not.

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

Cardio Chart ships an update every 25 months, and ZenWorkout daily. Most recently, Cardio Chart was updated on July 4, 2026 and ZenWorkout on September 14, 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.*