# CodeViewer vs API Zen

The clearest difference is price: API Zen at Free against CodeViewer's $0.29. API Zen also leads on update cadence (every 2 months vs every 8 months) and iOS requirement (13.0 vs 17.2). CodeViewer's advantage is in-app purchases (none vs 3). On ads and device support there is nothing between them.

API Zen is free to download; CodeViewer costs $0.29 up front. API Zen sells 3 one-off in-app purchases. CodeViewer asks for nothing beyond the download.

CodeViewer ships an update every 8 months, API Zen every 2 months. The most recent releases landed on October 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | CodeViewer | API Zen |
| --- | --- | --- |
| Price | $0.29 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 1 MB | 7 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [健 王](https://appshunter.io/developer/1558318494) | [Jaseem Valiya Valappil](https://appshunter.io/developer/1714873997) |

## What reviewers say

### CodeViewer

[App page](https://appshunter.io/ios/app/codeviewer/id6443973448)

**In-app purchases:** none


### API Zen

[App page](https://appshunter.io/ios/app/api-zen/id6471152115)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thanks | $3.99 | one-time |
| Thank you | $5.99 | one-time |
| Thank you very much | $7.99 | one-time |


## Frequently asked questions

### Is CodeViewer free?

CodeViewer costs $0.29, with no in-app purchases.

### Is API Zen free?

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

### Do CodeViewer or API Zen have ads?

Neither CodeViewer nor API Zen shows ads.

### Which is updated more often, CodeViewer or API Zen?

CodeViewer ships an update every 8 months, and API Zen every 2 months. Most recently, CodeViewer was updated on October 30, 2026 and API Zen 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.*