# Identify Colors Pro vs Circle Zen

The clearest difference is ads: Circle Zen at none against Identify Colors Pro's shown. Circle Zen also leads on update cadence (every 2 months vs every 7 months). Identify Colors Pro's advantage is iOS requirement (14.0 vs 16.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Identify Colors Pro ships an update every 7 months, Circle Zen every 2 months. The most recent releases landed on June 1, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Identify Colors Pro | Circle Zen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/identify-colors-pro/id1460644103/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 40 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [益 余](https://appshunter.io/developer/806853616) | [maoko](https://appshunter.io/developer/495151243) |

## What reviewers say

### Identify Colors Pro

[App page](https://appshunter.io/ios/app/identify-colors-pro/id1460644103)

This application helps users test and train their color perception and responsiveness. It also serves as a tool for amblyopia training, including monocular covering exercises.

**Highlights:** Color resolution testing, Color responsiveness training, Amblyopia training, Monocular covering exercises, Color perception improvement

**Features:** macOS Compatibility

**In-app purchases:** none


### Circle Zen

[App page](https://appshunter.io/ios/app/circle-zen/id6760607038)

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

**In-app purchases:** none


## Frequently asked questions

### Is Identify Colors Pro free?

Identify Colors Pro is free to download, with no in-app purchases.

### Is Circle Zen free?

Circle Zen is free to download, with no in-app purchases.

### Do Identify Colors Pro or Circle Zen have ads?

Identify Colors Pro shows ads; Circle Zen does not.

### Which is updated more often, Identify Colors Pro or Circle Zen?

Identify Colors Pro ships an update every 7 months, and Circle Zen every 2 months. Most recently, Identify Colors Pro was updated on June 1, 2026 and Circle Zen on September 20, 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.*