Circuitry vs Reduce Your CO2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Circuitry
Explore boolean algebra and digital circuits through interactive logic gate puzzles. Build and experiment with complex circuit designs in a sandbox environment. Progress through levels to unlock new components and challenges.
- Interactive logic circuit diagrams
- Boolean algebra learning
- Logic gate puzzles
- Sandbox circuit building
- Unlockable circuit components
- 21 logic problems
Read full descriptionHide full description
Circuitry is a hands-on logic game that makes Boolean algebra, logic gates, and digital circuits easier to understand. Build circuits by connecting AND, OR, XOR, NOT, and other gates, then experiment with different inputs to see how signals travel through your design. Work through 22 progressively challenging problems to unlock new components. Then use Playground Mode to create and test circuits of your own. Features: - 22 logic-circuit problems - Interactive circuit building and simulation - 36 different circuit components - Playground Mode for creating your own circuits
Reduce Your CO2
Read full descriptionHide full description
A mobile application that evaluates your decisions regarding activities and the impact on the creation of a CO2 footprint. Find out how your "CO2 avatar" changes and receive useful tips tailored to your needs.
Screenshots
Verdict
The clearest difference is update cadence: Reduce Your CO2 at every 8 days against Circuitry's every 46 months. Reduce Your CO2 also leads on device support (3 vs 1) and iOS requirement (13.0 vs 15.6). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Circuitry ships an update every 46 months, Reduce Your CO2 every 8 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.
| Parameter | Circuitry | Reduce Your CO2 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (291 ratings) — better | — |
| Positive reviews | 95.6% of reviews | — |
| Number of ratings | 291 — better | — |
| Update frequency | Every 46 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Anthony Foster | Slovak Eco Quality |
Bugs and requests
Circuitry
Reported bugs
7 issues- Problem #7 has no solution
- Wires get stuck/difficult to detach
- Clunky drag-and-drop for moving components and connecting wires
- 4-bit register has incorrect visual
- Problem #5 has a potential mistake in logic
Show 2 moreShow fewer
- Problem #7 (make OR with three NANDS) doesn't work correctly
- Full adder is missing an OR gate (reported)
Requested features
16 requests- More levels
- Explain more/help when stuck
- Ability to put text on buttons/LEDs
- More complex components (multiplexer, demultiplexer, ALU, shift register, decoders, etc.)
- Ability to adjust clock speed
Show 11 moreShow fewer
- Keep track of previous solutions
- Don't gate playground mode components behind problem progress
- Discrete math notation for circuits
- Simplification and scoring in problem mode
- Remove feature for components
- Add subtractor levels
- Rotation of components
- Naming buttons/outputs
- Labels for circuits
- Splitter to organize wiring
- Undo button
Reduce Your CO2
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Circuitry
No in-app purchases
Reduce Your CO2
No in-app purchases
Questions
Is Circuitry free?
Is Reduce Your CO2 free?
Do Circuitry or Reduce Your CO2 have ads?
Which is updated more often, Circuitry or Reduce Your CO2?
Other comparisons
