# sketchbookDuo vs RustMaster

The clearest difference is in-app purchases: sketchbookDuo at none against RustMaster's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RustMaster sells 1 one-off in-app purchase. sketchbookDuo asks for nothing beyond the download.

sketchbookDuo ships an update every 3 weeks, RustMaster monthly. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | sketchbookDuo | RustMaster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sketchbookduo/id6745931339/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 5 MB | 36 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Tocho Marking Systems, Inc.](https://appshunter.io/developer/1159545791) | [karos mohammed](https://appshunter.io/developer/1678806713) |

## What reviewers say

### sketchbookDuo

[App page](https://appshunter.io/ios/app/sketchbookduo/id6745931339)

Design, manage, and send marking data to compatible devices. Features a grid-based editor for precise text placement and robust file management for marking jobs. Connects wirelessly for efficient control of marking tasks.

**Highlights:** Grid-based editor, File management, Device connection, Marking control, Customizable grids

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

**In-app purchases:** none


### RustMaster

[App page](https://appshunter.io/ios/app/rustmaster-server-rcon-admin/id6752823350)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | one-time |


## Frequently asked questions

### Is sketchbookDuo free?

sketchbookDuo is free to download, with no in-app purchases.

### Is RustMaster free?

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

### Do sketchbookDuo or RustMaster have ads?

Neither sketchbookDuo nor RustMaster shows ads.

### Which is updated more often, sketchbookDuo or RustMaster?

sketchbookDuo ships an update every 3 weeks, and RustMaster monthly. Most recently, sketchbookDuo was updated on October 13, 2026 and RustMaster on October 7, 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.*