# Private Library vs Drawing Studio

The clearest difference is price: Drawing Studio at Free against Private Library's $1.99. Drawing Studio also leads on update cadence (every 9 days vs every 18 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Drawing Studio is free to download; Private Library costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Private Library ships an update every 18 months, Drawing Studio every 9 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Private Library | Drawing Studio |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.5 (2 ratings)](https://appshunter.io/ios/app/drawing-studio-draw-and-ai/id6698859618/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 9 MB | 89 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [艳华 顾](https://appshunter.io/developer/979842988) | [兴驰 马](https://appshunter.io/developer/922940648) |

## What reviewers say

### Private Library

[App page](https://appshunter.io/ios/app/private-library/id1672757489)

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

**In-app purchases:** none


### Drawing Studio

[App page](https://appshunter.io/ios/app/drawing-studio-draw-and-ai/id6698859618)

This app combines freehand sketching, structured diagrams, and professional visuals into a unified workspace for knowledge management. Organize notes with folders, revisit past versions, and sync across Apple devices via iCloud. Export your creations in PNG or SVG formats.

**Highlights:** Unified workspace for sketching and diagrams, Supports Excalidraw, Mermaid, and draw.io, Folder organization, Auto version history, iCloud sync across devices, Export to PNG/SVG

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Private Library free?

Private Library costs $1.99, with no in-app purchases.

### Is Drawing Studio free?

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

### Do Private Library or Drawing Studio have ads?

Neither Private Library nor Drawing Studio shows ads.

### Which is updated more often, Private Library or Drawing Studio?

Private Library ships an update every 18 months, and Drawing Studio every 9 days. Most recently, Private Library was updated on November 6, 2026 and Drawing Studio on October 30, 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.*