ilu vs Otteretto
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
ilu
This logic puzzle game challenges you to illuminate dark areas by strategically placing lights. As you terraform barren planets and spread light, watch them transform with vibrant, animated life. Discover clever solutions and enjoy a relaxing, dynamic experience.
- Infinite relaxing logic puzzles
- Illuminate dark areas with light
- Terraform barren planets
- Discover clever solutions
- Dynamic music
- Animated hint system
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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. STORY: 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. FEATURES: • 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.
Otteretto
A unique puzzle game where players create palindromes using letters and otters. It offers multiple endlessly replayable game modes, including daily challenges and competitive leaderboards.
- Unique palindrome puzzle mechanics
- Five endlessly replayable game modes
- Daily global competition
- Logical reasoning puzzles
- Competitive cross-platform leaderboards
- No ads or microtransactions
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Otteretto is a puzzle game about palindromes (and otters). NEW PUZZLE CONCEPT This isn't another match-3 game; it's a whole new idea to wrap your head around! How long of a palindrome can you make? 5 ENDLESSLY-REPLAYABLE GAME MODES Classic: Try to reach each level's score goal in the addictive original mode. The Daily Stack: Join a global competition every day! How many points can you get from the same set of squares as everyone else? Puzzle: Use logical reasoning to figure out how to turn a set of squares into a single, massive palindrome! Containment: With more squares being added every move, how long can you keep the container from overflowing? Walls: In this challenging variant, you'll need to get creative to work around each level's impassable walls. COMPETE WITH THE WORLD See how you stack up with online, cross-platform leaderboards! NO ADS, NO MICROTRANSACTIONS Play Classic mode and the Daily Stack for free with no limits! If you like those, you can purchase the full game to permanently unlock the rest.
Screenshots
Verdict
The clearest difference is review sentiment: Otteretto at 100% against ilu's 69%. Otteretto also leads on rating (5.0 vs 4.7). ilu's advantage is update cadence (every 3 weeks vs every 9 months) and ratings volume (2.1K vs 8). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ilu sells 9 one-off in-app purchases and Otteretto sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Otteretto holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: ilu has 2.1K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 69% of ilu's written reviews are positive against 100% of Otteretto's.
ilu ships an update every 3 weeks, Otteretto every 9 months. The most recent releases landed on September 10, 2026 and June 21, 2026 respectively.
| Parameter | ilu | Otteretto |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (2.1K ratings) | 5.0 (8 ratings) — better |
| Positive reviews | 69.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2.1K — better | 8 |
| Update frequency | Every 3 weeks — better | Every 9 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 535 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Brainium Studios LLC | Christopher Klimowski |
Customer experience
ilu
Otteretto
Bugs and requests
ilu
Reported bugs
3 issues- App crashes on launch for some users
- Placement of markers and lights not always registering correctly
- Recent update changed visuals in a way that made the game less clear
Requested features
4 requests- Zoom or pan functionality for larger puzzles
- Separate marker and light placement modes
- Progress tracking and ability to replay past puzzles
- More variety in background music tracks
Otteretto
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ilu
- 100 Ad-Free Puzzles$0.99
- Terra Suit$0.99
- Turbo Suit$1.99
Show 6 moreShow fewer
- The Botanic$1.99
- Pod$2.99
- Spectral Suit$3.99
- Chromus$4.99
- Ayianna$6.99
- Unlock Ad-Free$7.99
Otteretto
- Full Game Upgrade$2.99









