# Algodoo vs Chalk Board

The clearest difference is price: Chalk Board at Free against Algodoo's $7.99. Chalk Board also leads on rating (4.5 vs 3.8) and device support (3 vs 1). Algodoo's advantage is in-app purchases (none vs 1) and ads (none vs shown). On ratings volume and iOS requirement there is nothing between them.

Chalk Board is free to download; Algodoo costs $7.99 up front. Chalk Board sells 1 one-off in-app purchase. Algodoo asks for nothing beyond the download.

Chalk Board holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 1.2K and 810 respectively. Written reviews complicate that: 59% of Algodoo's written reviews are positive against 50% of Chalk Board's, so the app with the better star average is not the one people write more warmly about.

Algodoo ships an update monthly, Chalk Board every 6 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Algodoo | Chalk Board |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [3.8 (1.2K ratings)](https://appshunter.io/ios/app/algodoo/id616064935/reviews) | **[4.5 (810 ratings)](https://appshunter.io/ios/app/chalk-board-drawing-pad/id1515880393/reviews)** |
| Number of ratings | **1.2K** | 810 |
| Positive reviews | **58.7% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 6 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 29 MB | 129 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Algoryx Simulation AB](https://appshunter.io/developer/464050548) | [An Banh](https://appshunter.io/developer/1466900439) |

## What reviewers say

### Algodoo

[App page](https://appshunter.io/ios/app/algodoo/id616064935)

Design and experiment with realistic 2D physics simulations. Build intricate machines, create virtual science experiments, and explore cause and effect. Share your creations and discover those of others in a vibrant community.

**Highlights:** Create objects with shapes or free-hand drawing, Combine components for intricate machines, Choose and customize materials, Simulate physics with gravity and aerodynamics, Explore ideas through trial and error, Build animations, contraptions, and experiments, Access community-created scenes

**In-app purchases:** none

**What reviewers like**

- 🚀 Great physics simulation
- 👍 Interesting and fun to use
- 💡 Ability to create and share creations
- 🚀 No ads

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🐛 Issues with loading and saving scenes
- 🐛 Textures and images not working properly
- 🐛 Laggy performance with complex scenes

**Reported bugs**

- Scenes resetting to tutorial
- Textures and images not loading properly
- Crashes when trying to import images
- Buttons and controls not working as expected

**Requested features**

- Add text and scripting options on mobile
- Improve mobile UI and controls
- Implement more features from PC version
- Fix issues with account bans and deletions


### Chalk Board

[App page](https://appshunter.io/ios/app/chalk-board-drawing-pad/id1515880393)

This app offers a realistic chalkboard drawing experience with various chalk colors and adjustable brush sizes. It's perfect for quick notes, creative sketching, or as a fun learning tool for children. Share your creations easily on social media.

**Highlights:** Realistic chalkboard textures, Multiple chalk colors, Adjustable brush size, Optional chalk brush texture, Social media sharing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade Pro version | $0.99 | one-time |

**What reviewers like**

- 👍 Wonderful
- 💡 Great for playing games
- 👍 Nice chalkboard

**What reviewers complain about**

- 🐛 Undo function glitched
- 🐛 No eraser
- 🐛 Ads disturbed
- 🐛 Requires internet
- 🐛 Too many ads

**Reported bugs**

- Undo function glitched
- Doesn't work without internet

**Requested features**

- Add eraser functionality
- Ability to scroll down infinitely
- Add chalk sound effects
- Variety of chalk colors


## Frequently asked questions

### Is Algodoo free?

Algodoo costs $7.99, with no in-app purchases.

### Is Chalk Board free?

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

### Which has better reviews, Algodoo or Chalk Board?

Chalk Board is rated higher. Algodoo averages 3.8 out of 5 from 1.2K ratings, while Chalk Board averages 4.5 from 810 ratings.

### Do Algodoo or Chalk Board have ads?

Chalk Board shows ads; Algodoo does not.

### Which is updated more often, Algodoo or Chalk Board?

Algodoo ships an update monthly, and Chalk Board every 6 months. Most recently, Algodoo was updated on October 24, 2026 and Chalk Board on October 25, 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.*