Kobadoo Arithmetic drops you into a puzzle challenge you can start in a couple of seconds. It leans on math and memory, so expect a steady difficulty curve. Everything runs client-side, so it starts fast even on a modest connection.
About Kobadoo Arithmetic
Kobadoo Arithmetic is a game that trains your brain by memorizing and adding up numbers. When you play Kobadoo Arithmetic you are actively using your working memory. Several scientific studies suggest that training of working memory has beneficial effects and can increase your cognitive functions.
How to play Kobadoo Arithmetic
The rules land within the first few seconds of play. On desktop the arrow keys / WASD do the moving; the full mapping is in the table below. The game runs in portrait, so on a phone you can play one-handed, and on desktop it stays centred rather than stretched out of shape. Nothing is lost by trying something reckless once.
Controls
| Input | Action |
|---|---|
| Mouse | Navigate menus and interact |
| Arrow keys / WASD | Move |
| Spacebar | Primary action |
On mobile: Tap and swipe directly on the screen. The game is built for portrait, so you can play one-handed without rotating your phone.
Why it is worth playing
The appeal here is the loop: a short round, a clear result, and an obvious idea about what to do differently next time. The result is something you can pick up cold months later.
At a glance
- Free to play with no account required
- Runs in the browser — nothing to download or install
- Portrait layout, comfortable one-handed on mobile
- Keyboard and mouse on desktop, full touch support on mobile.
- Math gameplay — Mental arithmetic that does not feel like homework
- Memory gameplay — Train your recall
- Added to our catalogue from a 2022 release
Frequently asked questions
Is Kobadoo Arithmetic free to play?
Yes. Kobadoo Arithmetic is completely free and runs in your browser. There is no purchase, no subscription and no account needed — open the page and play.
Do I need to download or install anything?
No. Kobadoo Arithmetic is an HTML5 game that runs inside the page itself. There is nothing to install, no plugin and no launcher — it loads like any other web page.
Can I play Kobadoo Arithmetic on my phone?
Yes. Tap and swipe directly on the screen. The game is built for portrait, so you can play one-handed without rotating your phone.
What are the controls for Kobadoo Arithmetic?
Keyboard and mouse on desktop, full touch support on mobile. Mouse — navigate menus and interact; Arrow keys / WASD — move; Spacebar — primary action.
Can I play Kobadoo Arithmetic fullscreen?
There is a fullscreen control in the top-right of the player. Press Escape when you want the page back.
What kind of game is Kobadoo Arithmetic?
Kobadoo Arithmetic is a puzzle game built around math and memory. If that is the sort of thing you enjoy, the related games further down the page are picked using the same tags.
