# API Tool Pro vs Walnut

The clearest difference is in-app purchases: API Tool Pro at none against Walnut's 1. API Tool Pro also leads on ads (none vs shown) and iOS requirement (12.0 vs 18.4). On price, update cadence and device support there is nothing between them.

Both are free to download. Walnut sells 1 one-off in-app purchase. API Tool Pro asks for nothing beyond the download.

API Tool Pro ships an update every 3 days, Walnut every 4 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | API Tool Pro | Walnut |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/walnut-webview-debug-and-test/id6755930250/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 28 MB |
| Requires iOS | **12.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Ashen Ishanka Costha](https://appshunter.io/developer/1566497857) | [Jiwon Park](https://appshunter.io/developer/1842841535) |

## What reviewers say

### API Tool Pro

[App page](https://appshunter.io/ios/app/api-tool-pro/id6749198993)

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

**In-app purchases:** none


### Walnut

[App page](https://appshunter.io/ios/app/walnut-webview-debug-and-test/id6755930250)

This app allows developers to test WKWebView and SFSafariViewController configurations in real-time. It offers built-in DevTools for console, network, storage, and performance analysis, along with JavaScript injection and accessibility auditing.

**Highlights:** Real-time WKWebView configuration testing, Built-in DevTools (Console, Network, Storage), JavaScript injection and execution, SFSafariViewController testing with content blockers, Accessibility auditing (axe-core), Responsive viewport and device emulation, Bookmark management

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is API Tool Pro free?

API Tool Pro is free to download, with no in-app purchases.

### Is Walnut free?

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

### Do API Tool Pro or Walnut have ads?

Walnut shows ads; API Tool Pro does not.

### Which is updated more often, API Tool Pro or Walnut?

API Tool Pro ships an update every 3 days, and Walnut every 4 days. Most recently, API Tool Pro was updated on September 29, 2026 and Walnut on October 9, 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.*