10 Free MyRin Brain Games You Can Play in Your Browser

Most brain training apps ask you to install something, create an account and often start a free trial before you can see a single puzzle. MyRin takes the opposite approach. Ten of its games run free in your browser, on a phone or a computer, with nothing to download and no sign-up.

Each demo has five levels: enough to learn the game and see how it gets harder. Here is what each one is and what it tests. All of them are listed together on the MyRin games page.

Memory

1. Memory Match

Play Memory Match. All the cards are shown briefly, then turned face down. Find every pair in as few moves as possible. It tests how much you can take in during a short look and hold afterwards.

Tip: during the preview, look for pairs rather than single cards. Remembering where two stars are is one memory, not two.

2. Flip Match

Play Flip Match. Every card starts face down. Turn two at a time and remember what you have seen as the grid grows. Unlike Memory Match, there is no preview: you build your mental map as you go.

3. Simon Says

Play Simon Says. Watch a sequence of colours light up, then repeat it. Each round adds a step. It tests memory for order, and a single mistake ends the run.

For a closer comparison of these three, see MyRin's memory games compared.

Numbers

4. Sangaku

Play Sangaku. Fill the missing number in an equation, choosing from several options. It is named after the geometry tablets that people hung in Japanese shrines and temples in the Edo period. A calm, untimed way to practise arithmetic strategy.

5. Arithmetic Blitz

Play Arithmetic Blitz. Timed mental arithmetic: solve each sum before the countdown runs out. The fastest way to find out how quick your mental maths really is.

6. Balance Scale

Play Balance Scale. Add up the weights on one side and find the one that levels the beam. A gentle introduction for anyone who feels rusty with numbers.

7. Sequence

Play Sequence. Find the missing term in a series of numbers: arithmetic, geometric or square numbers. More about spotting patterns than calculating.

See MyRin's math games compared for how these fit together with the app-only games.

Speed and attention

8. Reaction Speed

Play Reaction Speed. Tap the moment the target turns green. You get your reaction time in milliseconds after every round. It takes less than a minute, which makes it the quickest way to try MyRin.

Curious how your time compares? See average reaction time by age.

9. Kana Scout

Play Kana Scout. Find the one katakana character that is slightly different in a grid of near-identical ones. It tests visual search. You do not need to read Japanese: it is about shapes, not meaning.

Language

10. Word Scramble

Play Word Scramble. Tap the scrambled letter tiles in the right order to rebuild the hidden word. A short break from numbers and shapes.

How the five levels get harder

Each demo is short, but it is not five copies of the same level. The difficulty climbs quickly, which gives you a fair idea of how the full game feels:

• Memory Match starts with 4 pairs and finishes with 12, on a wider grid.
• Flip Match grows from 2 pairs to 6, so the map you have to hold in your head triples.
• Simon Says starts with a 2-step sequence and ends with 6, including a repeated colour that catches many people out.
• Arithmetic Blitz moves from sums like 7 + 5 to problems like 13 × 13 and 256 ÷ 16, five per level against a short countdown.
• Sequence begins with counting in twos and ends with the Fibonacci sequence, where each number is the sum of the two before it.

If the fifth level of a demo feels comfortable, the app's medium levels are probably the right place to start. If it was a stretch, start on easy. There is no penalty for choosing either, and you can switch at any time.

Why demos instead of a trial

Many apps ask you to commit before you know whether you like them. We would rather you play first. A browser demo answers the only question that matters before installing anything: is this fun for you? If it is, the app has much more of the same. If not, you have lost two minutes and nothing else.

Where to start

• Thirty seconds: Reaction Speed.
• Two minutes: Memory Match, the best overall introduction.
• You like numbers: Arithmetic Blitz.
• You like a challenge: Simon Says. See how long a sequence you can hold.

Prefer to watch first?

Every one of these demos has a video walkthrough on the blog, showing how the game plays from the first level to the fifth. Start with the Memory Match walkthrough or the Reaction Speed walkthrough.

What the full app adds

The browser demos are a taste. The MyRin app adds:

• 20 more games, including Sudoku, Kakuro, Hashi, Nurikabe, Temari, Kamon, Karuta and Shuzan, for 30 in total.
• 600 levels per game across easy, medium and hard, so 18,000 levels in all.
• A 40-rank progression drawn from Japanese tradition, with XP for every level. See the ranks explained.
• Daily streaks that multiply the XP you earn.

It is free on iOS and Android, and you do not need an account. If you enjoyed one of the demos, the app is where it goes deeper.