# Target Zone Keeper vs CardioForge Workout Tracker

The clearest difference is in-app purchases: Target Zone Keeper at none against CardioForge Workout Tracker's 1. CardioForge Workout Tracker's advantage is update cadence (every 2 months vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CardioForge Workout Tracker sells 1 one-off in-app purchase. Target Zone Keeper asks for nothing beyond the download.

Target Zone Keeper ships an update every 7 months, CardioForge Workout Tracker every 2 months. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Target Zone Keeper | CardioForge Workout Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/target-zone-keeper/id6673919937/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 2 MB | 2 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Margarita Bliznikova](https://appshunter.io/developer/1765769948) | [DOMINIC JUAN LEBRON](https://appshunter.io/developer/1877381876) |

## What reviewers say

### Target Zone Keeper

[App page](https://appshunter.io/ios/app/target-zone-keeper/id6673919937)

This app helps improve cardiovascular fitness by guiding users to maintain their heart rate within an optimal zone for VO2 max enhancement. It offers non-disruptive alerts and visual cues, requiring minimal wrist interaction for seamless workout integration.

**Highlights:** Maintains target heart rate zone, Minimal wrist interaction required, Simple, intuitive setup, Customizable, non-disruptive alerts, Personalized heart rate zones, Apple Health integration

**In-app purchases:** none


### CardioForge Workout Tracker

[App page](https://appshunter.io/ios/app/cardioforge-workout-tracker/id6752625670)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CardioForge Pro | $4.99 | one-time |


## Frequently asked questions

### Is Target Zone Keeper free?

Target Zone Keeper is free to download, with no in-app purchases.

### Is CardioForge Workout Tracker free?

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

### Do Target Zone Keeper or CardioForge Workout Tracker have ads?

Neither Target Zone Keeper nor CardioForge Workout Tracker shows ads.

### Which is updated more often, Target Zone Keeper or CardioForge Workout Tracker?

Target Zone Keeper ships an update every 7 months, and CardioForge Workout Tracker every 2 months. Most recently, Target Zone Keeper was updated on September 23, 2026 and CardioForge Workout Tracker on October 2, 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.*