# iCardio Workout Tracker vs Simple Zones

The clearest difference is rating: iCardio Workout Tracker at 4.8 against Simple Zones's 4.0. iCardio Workout Tracker also leads on ratings volume (3.4K vs 50) and update cadence (every 11 days vs monthly). Simple Zones's advantage is iOS requirement (15.4 vs 17.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. iCardio Workout Tracker sells 4 in-app purchases, starting at $4.99 per month and Simple Zones sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

iCardio Workout Tracker holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: iCardio Workout Tracker has 3.4K ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 63% of iCardio Workout Tracker's written reviews are positive against 55% of Simple Zones's.

iCardio Workout Tracker ships an update every 11 days, Simple Zones monthly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iCardio Workout Tracker | Simple Zones |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (3.4K ratings)](https://appshunter.io/ios/app/icardio-workout-tracker/id314841648/reviews)** | [4.0 (50 ratings)](https://appshunter.io/ios/app/simple-zones/id1533922808/reviews) |
| Number of ratings | **3.4K** | 50 |
| Positive reviews | **63.2% of reviews** | 54.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Monthly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 85 MB | 18 MB |
| Requires iOS | 17.6 | **15.4** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Fitdigits Inc](https://appshunter.io/developer/1126857444) | [Bred Ventures Inc](https://appshunter.io/developer/897222461) |

## What reviewers say

### iCardio Workout Tracker

[App page](https://appshunter.io/ios/app/icardio-workout-tracker/id314841648)

This app helps you train smarter by using your heart rate data. It tracks workouts, provides real-time feedback, and integrates with wearables and Apple Health to offer insights into your performance and progress.

**Highlights:** Heart rate zone tracking, GPS route mapping, Voice coaching, Apple Watch & Health integration, Real-time workout sharing, Custom fitness assessments

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Star Monthly | $4.99 | per month |
| Pro Plus | $24.99 | per year |
| Star | $29.99 | per year |
| Plus | $6.99 | one-time |

**What reviewers like**

- 👍 Great app
- 🚀 Accurate tracking
- 💡 Customizable screens
- 🚀 Reliable connection
- 👍 Motivating

**What reviewers complain about**

- 🐛 Crashes and sync issues
- 🔋 Battery drain
- 🔒 Subscription model
- 🐛 Inconsistent performance
- 🐛 Sensor connection problems

**Reported bugs**

- Garmin ANT+ connectivity issues
- Incorrect calorie/distance tracking
- Unreliable heart rate monitoring

**Requested features**

- Lap/split time tracking
- Multi-user profiles
- Treadmill/elliptical integration
- More customization options
- Improved Apple Watch integration


### Simple Zones

[App page](https://appshunter.io/ios/app/simple-zones/id1533922808)

Track your workouts in real-time using heart rate zone training. Get instant feedback on your performance to optimize intensity and achieve your fitness goals. Supports Apple Watch and Bluetooth heart rate monitors.

**Highlights:** Real-time heart rate zone visualization, Apple Watch and Bluetooth HRM support, Customizable zone models, Apple Health integration, Workout data syncing, Activity ring tracking

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Zones Pro | $4.99 | one-time |
| Zones Pro | $9.99 | one-time |


## Frequently asked questions

### Is iCardio Workout Tracker free?

iCardio Workout Tracker is free to download, with in-app purchases available.

### Is Simple Zones free?

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

### Which has better reviews, iCardio Workout Tracker or Simple Zones?

iCardio Workout Tracker is rated higher. iCardio Workout Tracker averages 4.8 out of 5 from 3.4K ratings, while Simple Zones averages 4.0 from 50 ratings.

### Do iCardio Workout Tracker or Simple Zones have ads?

Neither iCardio Workout Tracker nor Simple Zones shows ads.

### Which is updated more often, iCardio Workout Tracker or Simple Zones?

iCardio Workout Tracker ships an update every 11 days, and Simple Zones monthly. Most recently, iCardio Workout Tracker was updated on October 21, 2026 and Simple Zones on October 24, 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.*