Comparison

Algodoo vs Chalk Board

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Algodoo

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
Read full description

Bring your ideas to life with realistic physics in Algodoo. This creative and educational app lets you design two-dimensional scenes where objects move according to the laws of physics. See cause and effect in action and refine your builds to perfection. Algodoo is a virtual 2D construction set to enjoy the creative thrill of building fun scenes and machines. You’ll never run out of parts. You can go deeper and analyse the motion and learn about mechanical devices. Once you master the tools and principles, you can build sandbox games or mesmerising, complex simulations. • Use basic 2D geometrical shapes or the free-hand drawing tool to create objects. • Combine components like axles, springs, motors, ropes, and lasers to create intricate machines. • Choose from various materials—steel, wood, rubber, water, and helium—and customise at will. • Press “Simulate” to bring your scene to life, moving under the forces of gravity, aerodynamics, buoyancy, and more. • Use trial and error to explore ideas and perfect your inventions. • Express your imagination with vibrant colors, shapes, and textures. Looking to build animations, contraptions, marble races, moving structures, chain reactions, or virtual science experiments? With Algodoo, the possibilities for invention, creativity, and exploration are endless. With the Quick Tour and tutorial videos, you can easily learn Algodoo’s basic tools and principles. It's not just for fun— the scientific foundation of Algodoo makes it a great teaching and learning aid for exploring physics concepts, operating principles of machines, and even construction. Discover the creativity of others and get inspired for your next build by visiting the Algobox library. Access thousands of scenes created by the Algodoo community and share your own creations by signing up for an Algobox account. Algodoo offers endless fun for users of all ages. Download the app now and start building, and search for #Algodoo on YouTube or social media to explore videos showcasing imaginative creations from our global community.

About

Chalk Board

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
Read full description

Chalkboard is a chalkboard like easy drawing tool with realistic textures. Can be used as a scratch paper to record inspiration, share ideas; also used as a child learning to draw, children drawing, reading a small blackboard. 【Features】 · Draw on a Blackboard with any color chalks · You can choose whether to enable chalk brush texture · Brush size can be adjusted at will · Can share to Instagram, Twitter, Facebook 【Contact us】 Gmail:drawerfree@gmail.com

Screenshots

Chalk Board2 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard8 real differences · 2 level
Algodoo versus Chalk Board: the parameters behind the verdict, then further details
ParameterAlgodooChalk Board
Price$7.99Free — better
Rating3.8 (1.2K ratings)4.5 (810 ratings) — better
Positive reviews58.7% of reviews — better50.0% of reviews
Number of ratings1.2K — better810
Update frequencyMonthly — betterEvery 6 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better12.4
Further details — not scored
Size29 MB129 MB
Age rating9+4+
DeveloperAlgoryx Simulation ABAn Banh

Customer experience

Algodoo

All ratings878 ratings
Positive69.2%
Neutral7.5%
Negative23.2%
Written reviews726 reviews
Positive58.7%
Neutral12.5%
Negative28.8%

Chalk Board

All ratings798 ratings
Positive85.6%
Neutral6.3%
Negative8.1%
Written reviews34 reviews
Positive50.0%
Neutral17.6%
Negative32.4%

User reviews

Algodoo

From 1.2K App Store ratings

What we love

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

Room to improve

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

Chalk Board

From 810 App Store ratings

What we love

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

Room to improve

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

Bugs and requests

Algodoo

Reported bugs

4 issues
  • 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

4 requests
  • 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

Reported bugs

2 issues
  • Undo function glitched
  • Doesn't work without internet

Requested features

4 requests
  • Add eraser functionality
  • Ability to scroll down infinitely
  • Add chalk sound effects
  • Variety of chalk colors

In-app purchases

None

Algodoo

No in-app purchases

1 purchases

Chalk Board

One-time1
  • Upgrade Pro version$0.99

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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