ilu is a puzzle game.

In every puzzle, all that is dark must light up.

You place a light by tapping a dark area.

You will discover clever ways to place the lights as you play the game.


ilu is light.

You are a keeper of light.

In the vast void of space, countless lost worlds drift in the dark. Planets that have lost their star mothers and are too far and cold for the rays of starlight to warm their dark and frozen features.

It is your mission to terraform these barren planets.
As you spread light through the worlds of ilu, watch the ground light up while colorful and beautifully animated plants sprout as the entire world gently teems with life.


• Infinite relaxing logic puzzles solved with light
• Simple rules that create compelling solutions
• Dynamic music that responds to your play
• An animated & intelligent hint system that teaches & guides your way

The puzzles of ilu can be solved with pure logic alone. We wanted to share the wonderful "aha!" moments of discovering the solutions with you.

ilu is supported with ads, but you have the option to permanently remove the ads from the game with an in-app purchase.

What's New

Version 1.0.4

Thank you for playing ilu! We're excited to continue improving the game, below are some of the additions to the latest version.

- Fixed a major bug that created negative energy in Double Tap marker mode
- Fixed a text coloration bug that affected hints and tooltips
- Made it much less likely to encounter a repeated puzzle

Ratings and Reviews

4.5 out of 5

46 Ratings

46 Ratings

Keeps crashing


I like the game a lot but I got stuck and wanted to play the tutorial again but it kept crashing then I couldn't open the game at all. Deleted it, started again but the same thing happened.

Great game


This can get pretty complicated on harder settings. I really enjoy this game and it’s nicely presented too.

Two suggestions - allow a slightly longer double click when placing a marker - it’s currently very easy to inadvertently make a mistake.

The program seems to drain battery at a ridiculous rate which seems entirely unnecessary given that objectively this app is hardly a heavy hitter

Great game but I’m stuck!


I’ve reached level 9 on the second planet and cannot seem to get anywhere- there is no way to arrange the top right corner. Any ideas??

Lovely game, it tickles the same part of my brain as a sudoku.


Brainium Studios LLC
331.4 MB
Requires iOS 9.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad Wi-Fi (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular and iPod touch (6th generation).
Age Rating
Rated 4+
© Brainium 2018
In-App Purchases
  1. 100 Ad-Free Puzzles £0.99
  2. Ayianna £6.99
  3. Spectral Suit £3.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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