HIDDENBLOCKS
HIDDEN BLOCKS Think in 3D

See beyond
the blocks.

Look at a stack of blocks straight on. Counting only what you can see will never get you the right answer — the ones hidden behind, the ones tucked underneath, you have to picture the whole structure in your head.

Download on the App Store Get it on Google Play See how it plays
2 game modes
Daily Blocks
Free to play
HIDDEN BLOCKS home screen
Two ways to play, one brain teaser

Pick a mode and start
training your spatial sense.

Every stage is a 3D stack of blocks. Read the shape, picture the depth, and answer before the timer runs out. Difficulty ramps up as you go: you start with simple structures and work your way up to multi-layer stacks that push your brain to its limits.

Mode 1

Count All

Count every single block in the stack — the ones you can see and the ones hiding behind others. Spatial awareness is everything here.

  • 1View the 3D shape from one angle.
  • 2No gaps — blocks always sit on something.
  • 3Add up every column for the total.
Count All gameplay
Mode 2

Count Hidden

Count only the blocks you cannot directly see. Same stack, completely different approach. This mode demands a higher level of logical reasoning.

  • 1Picture the full 3D shape in your head.
  • 2Find blocks covered on all visible sides.
  • 3Count only those hidden blocks.
Count Hidden gameplay
More to explore

Getting it right
is just the beginning.

The global leaderboard ranks players by the furthest stage they've reached. If two players are on the same stage, whoever got there first comes out ahead.

Global Leaderboard
Global Leaderboard
Good to know

Frequently asked questions

What is HIDDEN BLOCKS?
HIDDEN BLOCKS is a free spatial brain puzzle by LOGAN LAND. You count cubes stacked into 3D shapes, including the blocks tucked away behind the ones you can see, to train your sense of space.
What game modes does it have?
Two core modes. Count All asks you to count the whole stack including every hidden block; Count Hidden asks you to count only the blocks completely hidden behind others. There is also a Daily Blocks challenge each day, and a Practice mode for counting with nothing at stake.
Is it free to play?
Yes. HIDDEN BLOCKS is free to download and play on Android and iOS, with optional in-app purchases.
How do you count hidden blocks?
Every block sits on something — there are no floating gaps — so you can infer the columns you can't see directly. Picture the full 3D shape, work out each column's height, then count the blocks covered on all visible sides.
What platforms can I play on?
HIDDEN BLOCKS is available on Google Play (Android) and the Apple App Store (iOS). In Korea, you can also play it inside the Toss app (Apps in Toss).
Who made HIDDEN BLOCKS?
HIDDEN BLOCKS is made by LOGAN LAND, an independent game publisher. For support, contact hiddenblocks@loganland.app.
What's the difference between Count All and Count Hidden?
Count All is the total number of cubes in the stack, including the ones hidden behind others. Count Hidden is only the cubes completely hidden from view. Same stack, two different answers.
What is Daily Blocks?
A new puzzle drops every day — the same one for every player in the world, available for that day only. You get up to three attempts; a correct answer earns a Gem and puts your time on that day's global ranking. When the day ends your final placement is settled for the next-day recap.
Do I need an account to play?
No. You can start playing right away as a guest. Signing in is optional and lets you save your progress across devices.
Where does the idea come from?
Counting stacked unit cubes is a classic spatial reasoning exercise found in math curricula around the world — Common Core in the US, Singapore Math, the UK National Curriculum. It trains the same 3D thinking that engineers, architects and pilots use every day. HIDDEN BLOCKS takes that off the classroom page and turns it into a daily brain game.
Can I play a puzzle without it counting?
Yes. Practice draws one random puzzle from both modes, fresh each time. No stars, no records, no ranking — just the counting. Use it to warm up before a stage, or when you only want the puzzle itself.
Ready when you are

Find every block —
even the ones you can't see.

Download HIDDEN BLOCKS and put your spatial sense to the test, one stack at a time.

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