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 1.0.8

Thanks so much for playing ilu! We've got a few new features in this update that we hope you'll enjoy:
- Daily puzzles
- New animations

Ratings and Reviews

4.7 out of 5
1.6K Ratings

1.6K Ratings

FreeSpiritedMaggs ,

Interesting Game

Let me preface this review with a note that I am in recovery for a severe left frontal lobe traumatic brain injury.

Because of the damage to audio circuits, I am unable to tolerate the music and sounds to most game—this one included. Luckily, there is a setting for no music/no sound. This means I am not getting the full zen effect the game promotes.

It takes a while for my brain to catch on to new games. This one included. I am playing on very easy. I do not appreciate the game asking me at the end of every game to increase my difficulty level. It has even tried changing the setting for me. I know how rapidly to advance new stimulus to my brain.

The graphics are delightful. The game stimulating.

I can only play in short stints—maybe 3 or 4 patterns worked, then off. I also find I must limit play to once a day, skip a day or two, play another day. Here again, this is limits of TBI.

I would definitely recommend this game, just pay attention to your own reaction to the game and play accordingly.

Dragonlady890 ,

Beautiful game, but...

So, I really do love this game, it’s beautiful and relaxing. The varying difficulties are wonderful if you’re looking for something challenging one day and something a little easier the next. I have also noticed that the developer responds to a fair number of these reviews when people bring up problems which leads me to the only complaint I have so far — on the past few levels I’ve played, when I’ve placed a marker on a square to eliminate it, I’ve been penalized with that red bar at the top. It’s incredibly frustrating because I know that square can’t be lit, but I can’t actually place the marker, and on the bigger levels it’s a lot of information to try and keep track of.

Thanks in advance for reading my review!

Developer Response ,

Hi Dragonlady- Thank you so much for playing :) We are so sorry about this marker bug, and we're going to have a fix available asap! If you press the settings button in the upper righthand corner and switch your marker mode from from Double Tap to Swipe then you'll be able to enter markers without penalty in the meantime. Our apologies again!

Vagittarius13 ,

So. Much. Fun.

I spend a HUGE chunk of my work day on the phone, and about 40% of that time is spent on hold. This game has been a perfect way to keep my cool and mellow-out during long periods of repetitive hold music and monotonous pre-recorded histories of businesses. The graphics and visuals are so gorgeous and the sound design is just beautiful. Every tap has deliberate sound and the music is so lovely and soothing. I’ve terra-formed SO many planets, which is way more fun than practicing my hand-writing over and over again on a legal pad. This game is challenging and satisfying. Exactly what I needed!


Brainium Studios LLC
333.4 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, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, 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, iPad Pro (12.9‑inch), iPad Pro (12.9‑inch) Wi-Fi + Cellular, iPad Pro (9.7‑inch), iPad Pro (9.7‑inch) Wi‑Fi + Cellular, iPad (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5‑inch), iPad Pro (10.5‑inch) Wi‑Fi + Cellular, iPad (6th generation), iPad Wi‑Fi + Cellular (6th generation), iPad Pro (11‑inch), iPad Pro (11‑inch) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (3rd generation), iPad Pro (12.9‑inch) (3rd generation) Wi‑Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi‑Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi‑Fi + Cellular, iPad (7th generation), iPad (7th generation) Wi‑Fi + Cellular, iPod touch (6th generation), and iPod touch (7th generation).



Age Rating
In-App Purchases
  1. 100 Ad-Free Puzzles $0.99
  2. Terra Suit $0.99
  3. Turbo Suit $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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