# Target Zone Keeper vs Sovon

The clearest difference is in-app purchases: Target Zone Keeper at none against Sovon's 1. Sovon's advantage is update cadence (every 8 days vs every 7 months). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Target Zone Keeper against 5.0 for Sovon. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Target Zone Keeper ships an update every 7 months, Sovon every 8 days. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Target Zone Keeper | Sovon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/target-zone-keeper/id6673919937/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sovon/id6763918863/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 8 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 16 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Margarita Bliznikova](https://appshunter.io/developer/1765769948) | [Victor Boutte](https://appshunter.io/developer/1895556023) |

## 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


### Sovon

[App page](https://appshunter.io/ios/app/sovon/id6763918863)

Quickly log your fitness activities with this iPhone-first tracker. It offers fast manual entry, Apple Health import, and Siri integration, even from a locked screen. View your progress with clear, local charts and export your data for further analysis.

**Highlights:** Quick Capture logging, Manual entry, Apple Health import, Siri integration, Local data storage, Activity history and personal records, Apple Watch companion app

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extended History | $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 Sovon free?

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

### Which has better reviews, Target Zone Keeper or Sovon?

Target Zone Keeper and Sovon are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Target Zone Keeper or Sovon have ads?

Neither Target Zone Keeper nor Sovon shows ads.

### Which is updated more often, Target Zone Keeper or Sovon?

Target Zone Keeper ships an update every 7 months, and Sovon every 8 days. Most recently, Target Zone Keeper was updated on October 9, 2026 and Sovon on October 7, 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.*