# sketchbookDuo — MB3/PM2 Pin Marker Control App

> Companion app for MarkinBox and Patmark devices to design and send marking data. (iPhone/iPad app by Tocho Marking Systems, Inc..)

- Source: https://appshunter.io/ios/app/sketchbookduo/id6745931339 (this page in markdown: same URL + `.md`)
- Developer: [Tocho Marking Systems, Inc.](https://appshunter.io/developer/1159545791)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.6 · 3 MB
- Languages: English, German, Japanese, Spanish
- Released: 2025-09-10
- Data updated: 2026-09-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sketchbookduo/id6745931339/reviews.md

## What is sketchbookDuo?

sketchbookDuo is the official companion app for MarkinBox and Patmark devices.
With sketchbookDuo, you can easily design, manage, and send marking data directly from your iPhone or iPad to your MB3 device.

Key Features
	•	Grid-based editor – Create and place text precisely on customizable grids (80×20, 33×15, 15×15).
	•	File management – Save, load, rename, overwrite, and delete local marking files (.bppg).
	•	Device connection – Connect to MB3 devices quickly over Wi-Fi.
	•	Marking control – Start, pause, and send marking jobs with one tap.
	•	Settings – Adjust grid sizes and prepare for future features.

sketchbookDuo is designed for professionals who need precision and efficiency in portable marking. Whether in the workshop or on-site, MB3App makes marking tasks simpler, faster, and more reliable.

## Key features

- Grid-based editor
- File management
- Device connection
- Marking control
- Customizable grids


## Frequently asked questions about sketchbookDuo

### What devices is sketchbookDuo compatible with?

sketchbookDuo is the official companion app for MarkinBox and Patmark devices. It is designed to connect to MB3 devices quickly over Wi-Fi and is available for iPhone and iPad.

### How does sketchbookDuo help with marking tasks?

sketchbookDuo allows users to design, manage, and send marking data directly to their MB3 devices. It offers features like a grid-based editor for precise text placement and one-tap control for starting, pausing, and sending marking jobs.

### What are the grid sizes available in sketchbookDuo?

sketchbookDuo offers a grid-based editor with customizable grid sizes. Users can choose from 80x20, 33x15, and 15x15 grids for precise text placement.

### Can I manage my marking files with sketchbookDuo?

Yes, sketchbookDuo provides robust file management capabilities. You can save, load, rename, overwrite, and delete local marking files in the .bppg format directly from the app.

### Is sketchbookDuo free to use?

Yes, sketchbookDuo is available for free. The app does not have in-app purchases or advertisements, making it a completely free utility for its intended users.

### How often is sketchbookDuo updated?

The latest version of sketchbookDuo is 3.2, which was last updated on April 14, 2026. While specific update frequency isn't detailed, the app receives updates to improve functionality and prepare for future features.

### What is the age rating for sketchbookDuo?

sketchbookDuo has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

### Does sketchbookDuo have ads?

No, sketchbookDuo does not contain advertisements. The app is entirely free and ad-free, providing an uninterrupted user experience for managing marking tasks.

## Version history (last 5 releases)

### 3.7 — 2026-09-02

Minor changes made to serial setting, serial download, and preview screen

### 3.6 — 2026-08-20

Minor bug fixes

### 3.5 — 2026-08-11

Added serial implementation

### 3.4 — 2026-06-21

Added ability to read Remote File and Dashboard :)

### 3.2 — 2026-04-14

Minor bug fixes

## More apps by Tocho Marking Systems, Inc.

- [sketchbook 2 touch](https://appshunter.io/ios/app/sketchbook-2-touch/id1159545792)
- [Patmark Apps](https://appshunter.io/ios/app/patmark-apps/id1282789723)
- [sketchbook 2 lite](https://appshunter.io/ios/app/sketchbook-2-lite/id1510949141)

All apps by Tocho Marking Systems, Inc.: https://appshunter.io/developer/1159545791

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*