Comparison

Circuit Cubes vs KAI Robotics

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

Head to head
About

Circuit Cubes

Add power, motion, and light to toys with electronic building blocks. Control creations with various modes or basic programming. Compatible with major brick brands and includes kit instructions.

Highlights
  • Add power, motion, and light
  • Compatible with major brick brands
  • Control creations via app modes
  • Basic programming interface
  • Includes kit instructions
  • Save custom builds
Features
Read full description

Bring your toys to life with Circuit Cubes, the electronic building blocks that add power, motion, and light to your creations. Designed by STEM teachers, Circuit Cubes can turn on a light, power a motor, or make wheels spin — plus they are compatible with all major brand bricks. The Circuit Cubes app allows you to push the limits of what you can do with your builds. Control your creations by using Tank, Tinker, or Gamepad modes and even create basic programming in the Code interface. The app includes the instructions for all the Circuit Cubes kits. You can also save your own creations to My Builds.

About

KAI Robotics

Build and control an AI robot using your device. Collect data, train the AI model with gestures and sounds, and then play with your robot. Offers remote control and customization options for the robot's LED display.

Highlights
  • Build an AI robot
  • Gesture recognition control
  • Sound recognition control
  • Train AI models
  • Offline data processing
  • Remote control mode
  • Customizable LED display
Features
Read full description

The app for KAI: The Artificial Intelligence Robot STEM Experiment Kit: Safely explore and understand AI and the future of advanced computing technology. With the physical expeiment kit, build your own six-legged, artificial intelligence robot that moves by reacting to the gestures and sounds that you make! There are three steps to create a functioning AI model that allows you to control your robot using poses or sounds: 1. Collect data. 2. Train the AI model with your data. 3. Play with your robot using the AI model. Collect data: Use the app to easily collect the data you need to assign your own movements or sounds to your robot's functions, enabling it to walk, turn, and stop; explore the concept of machine learning as your AI robot learns the gestures and sounds to better perform the assigned functions. Gesture recognition: Choose a gesture or movement to assign to a specific function of your physical robot. For example, you can raise your right arm to trigger the "move right" function. Sound recognition: Choose a sound to assign to a specific function of your physcial robot. For example, you can whistle or clap to trigger the "move right" function. Train the AI model: The data you collected forms a dataset which is then used to create an AI model that your robot can learn from. Play with your robot: Now you can perform the poses or sounds you assigned to various actions and control your robot to move in specific ways! Additionally, the app allows you to play with the robot in remote control mode: - Use the virtual joystick or position sensor of your phone/tablet to move your robot without utilizing any of its AI functions. - Tap on predetermined facial expressions to change the face on the robot’s LED display, or use the draw or text button to customize the facial expression or text that appears on the LED display. The app has been developed to keep your data as safe and private as possible. The app works completely offline, without connection to the Internet, meaning that all calculations are made locally on your device and no image or audio data is stored by the app. This has been confirmed by an independent data protection expert. The full functionality of the app is only available in combination with the physical KAI: The Artificial Intelligence Robot STEM Experiment Kit. ***** Questions or suggestions for improvements: Mail to apps@kosmos.de We are looking forward to your feedback! ****

Screenshots

Circuit Cubes4 screens
KAI Robotics4 screens

Verdict

The call

The clearest difference is update cadence: Circuit Cubes at monthly against KAI Robotics's every 16 months. Circuit Cubes also leads on review sentiment (42% vs 27%) and ratings volume (57 vs 12). KAI Robotics's advantage is rating (3.6 vs 3.4) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

KAI Robotics holds the better App Store score, 3.6 against 3.4. Both are backed by a comparable volume of ratings — 57 and 12 respectively. Written reviews complicate that: 42% of Circuit Cubes's written reviews are positive against 27% of KAI Robotics's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Circuit Cubes ships an update monthly, KAI Robotics every 16 months. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.

Scorecard5 real differences · 5 level
Circuit Cubes versus KAI Robotics: the parameters behind the verdict, then further details
ParameterCircuit CubesKAI Robotics
PriceFreeFree
Rating3.4 (57 ratings)3.6 (12 ratings) — better
Positive reviews42.1% of reviews — better27.3% of reviews
Number of ratings57 — better12
Update frequencyMonthly — betterEvery 16 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size145 MB68 MB
Age rating4+4+
DeveloperTenka IncFranckh-Kosmos Verlags GmbH & Co. KG

Customer experience

Circuit Cubes

All ratings57 ratings
Positive57.9%
Neutral5.3%
Negative36.8%
Written reviews19 reviews
Positive42.1%
Neutral15.8%
Negative42.1%

KAI Robotics

All ratings12 ratings
Positive58.3%
Neutral16.7%
Negative25.0%
Written reviews11 reviews
Positive27.3%
Neutral18.2%
Negative54.5%

In-app purchases

None

Circuit Cubes

No in-app purchases

None

KAI Robotics

No in-app purchases

Questions

Is Circuit Cubes free?
Circuit Cubes is free to download, with no in-app purchases.
Is KAI Robotics free?
KAI Robotics is free to download, with no in-app purchases.
Which has better reviews, Circuit Cubes or KAI Robotics?
KAI Robotics is rated higher. Circuit Cubes averages 3.4 out of 5 from 57 ratings, while KAI Robotics averages 3.6 from 12 ratings.
Do Circuit Cubes or KAI Robotics have ads?
Neither Circuit Cubes nor KAI Robotics shows ads.
Which is updated more often, Circuit Cubes or KAI Robotics?
Circuit Cubes ships an update monthly, and KAI Robotics every 16 months. Most recently, Circuit Cubes was updated on September 9, 2026 and KAI Robotics on September 11, 2026.

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