ilu 4+

A logic puzzle of light & life

Brainium Studios LLC

    • 4.7 • 2.1K Ratings
    • Free
    • Offers In-App Purchases



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 1.0.10

This will be our final ilu update, so we've removed ads in addition to some bug fixes and improvements :)
Thank you so much for playing!

Ratings and Reviews

4.7 out of 5
2.1K Ratings

2.1K Ratings

krismouse ,

Amazing game!

This game is addictive! The ambient soundtrack coordinates with the game sounds, which makes for a really relaxing mood. I would love an mp3 of just the soundtrack. My favorite feature of the game is how you can still “play” the lights like musical notes ad the end of each puzzle and level. So cool!

It took me several levels to find the “very easy” puzzles truly easy. Some of the “easy” ones were rather wicked! The puzzles get easier with practice, so I guess it’s good there are lots of higher difficulty settings. That the user has control of the difficulty level is excellent, because sometimes you just want to relax, and the ZAP you get when you fail to solve the puzzle is not relaxing. 😉

The ads aren’t awful, though they do disrupt the game’s ambient mood. You can dismiss five ads at a time by watching one longer one. After I get my next paycheck I’ll definitely pay for the ad-free version. Well worth it!

Illeism ,

Great game

Update April 30, 2021: It’s unfortunate that this game has become abandonware. It was a superior puzzle game and I still play it a few time a week. The latest update put the score bar over the top part of the puzzle, on my iPad, making it difficult to tap squares in that area. Support for the Apple Pencil would have been nice but, unless I’m doing something insane, it doesn’t register. Hopefully we’ll get one more update or maybe an Ilu 2.

This is a great game - just waiting on those promised updates :-) - on a side note - this game need one fix - I can’t tell you how many times I’ve missed my perfect game because of a misclick - there needs to be an undo button for one move back that has a 15 second or so cool down so we can still get that perfect game - otherwise this game rules!

Developer Response ,

Thank you for your feedback, Illeism! We are working on that final fix and look forward to releasing it in the next month. Thank you for your patience and understanding.

ArtsyAxolotl ,

Pretty relaxing but still a little challenging

The music in this game is really chill and the sound effects are pleasant so it makes the game kinda relaxing to play. It’s also a pretty unique puzzle game to my knowledge and it’s been a lot of fun to play!

My favorite thing about the game is actually the hint system. Free unlimited hints with no micro transaction is already great but on top of that, it doesn’t just tell you where to put a light. It actually shows you the next logical move and explains how placing a light or maker in a locations affects the board and why you should pay attention to it. It makes me feel like the game is teaching me and I actually don’t abuse the free hints because I feel like it’s teaching me well enough!

I think the only thing I might like to see improved is a way to “imagine” placed lights, without committing to them and ruining your first try score. The hint system will preview lights for you but I wish you could do that on your own. I’m bad at visualizing what will be blocked or covered. Just a little thing.

Over all though this is a pretty cool and unique game!

App Privacy

The developer, Brainium Studios LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

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