# Dev Tool box vs hYYa ink

The clearest difference is in-app purchases: Dev Tool box at none against hYYa ink's 1. hYYa ink's advantage is ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. hYYa ink sells 1 one-off in-app purchase. Dev Tool box asks for nothing beyond the download.

Dev Tool box ships an update every 3 weeks, hYYa ink every 3 days. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Dev Tool box | hYYa ink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hyya-ink-pdf-and-markdown/id6786209046/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 4 MB | 16 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Seonggon Sim](https://appshunter.io/developer/1565259950) | [Hassaan Abdeen](https://appshunter.io/developer/1866789892) |

## What reviewers say

### Dev Tool box

[App page](https://appshunter.io/ios/app/dev-tool-box-developer-tools/id6749840624)

**Features:** Vision Pro support

**In-app purchases:** none


### hYYa ink

[App page](https://appshunter.io/ios/app/hyya-ink-pdf-and-markdown/id6786209046)

This app transforms raw text files like Markdown, JSON, and CSV into readable, editable documents. It also offers robust PDF management, including editing, signing, and making scanned documents searchable. AI integration allows for summarization and reformatting of text-based files.

**Highlights:** Live Markdown rendering with formatting toolbar, Editable JSON, YAML, TOML trees, Interactive CSV/TSV tables, Offline diagram generation (Mermaid, Graphviz), Beautifully typeset LaTeX math, PDF editing, signing, and search, On-device AI actions for text manipulation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| hYYa ink Pro | $19.99 | one-time |


## Frequently asked questions

### Is Dev Tool box free?

Dev Tool box is free to download, with no in-app purchases.

### Is hYYa ink free?

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

### Do Dev Tool box or hYYa ink have ads?

Dev Tool box shows ads; hYYa ink does not.

### Which is updated more often, Dev Tool box or hYYa ink?

Dev Tool box ships an update every 3 weeks, and hYYa ink every 3 days. Most recently, Dev Tool box was updated on October 21, 2026 and hYYa ink on October 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.*