# Preview App vs YAML Tools

The clearest difference is update cadence: YAML Tools at monthly against Preview App's every 13 months. YAML Tools also leads on chart position (#103 vs unranked) and price ($0.99 vs $1.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Preview App costs $1.99 and YAML Tools $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Preview App ships an update every 13 months, YAML Tools monthly. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Preview App | YAML Tools |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/yaml-tools/id6758571420/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Monthly** |
| Monetization | — | Paid |
| Best chart rank | — | **#103** |
| Size | 8 MB | 30 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Cangmu Technology Co., Ltd](https://appshunter.io/developer/1736424342) | [Mohammed Aadhil](https://appshunter.io/developer/1526081218) |

## What reviewers say

### Preview App

[App page](https://appshunter.io/ios/app/preview-app-store-simulator/id1626025800)

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

**In-app purchases:** none


### YAML Tools

[App page](https://appshunter.io/ios/app/yaml-tools/id6758571420)

**Currently charting:** #103 Top Paid · Developer Tools (US App Store)

A comprehensive YAML utility for developers on iOS. Visualize, format, convert, and generate code from YAML files. Includes validation and a dedicated syntax keyboard for efficient editing.

**Highlights:** Interactive Tree and Table View for YAML visualization, Convert YAML to JSON, XML, CSV, and more, Generate type-safe model classes for multiple languages, Real-time JSON Schema generation and validation, Dedicated YAML syntax keyboard overlay, Format and minify YAML structures

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

**In-app purchases:** none


## Frequently asked questions

### Is Preview App free?

Preview App costs $1.99, with no in-app purchases.

### Is YAML Tools free?

YAML Tools costs $0.99, with no in-app purchases.

### Do Preview App or YAML Tools have ads?

Neither Preview App nor YAML Tools shows ads.

### Which is updated more often, Preview App or YAML Tools?

Preview App ships an update every 13 months, and YAML Tools monthly. Most recently, Preview App was updated on September 21, 2026 and YAML Tools on September 19, 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.*