# ilu vs Otteretto

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.

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.

## The numbers

| Metric | ilu | Otteretto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (2.1K ratings)](https://appshunter.io/ios/app/ilu/id1271512200/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/otteretto/id1608448950/reviews)** |
| Number of ratings | **2.1K** | 8 |
| Positive reviews | 69.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 9 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 535 MB | 14 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brainium Studios LLC](https://appshunter.io/developer/300891405) | [Christopher Klimowski](https://appshunter.io/developer/1608448952) |

## What reviewers say

### ilu

[App page](https://appshunter.io/ios/app/ilu/id1271512200)

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.

**Highlights:** Infinite relaxing logic puzzles, Illuminate dark areas with light, Terraform barren planets, Discover clever solutions, Dynamic music, Animated hint system

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Ad-Free Puzzles | $0.99 | one-time |
| Terra Suit | $0.99 | one-time |
| Turbo Suit | $1.99 | one-time |
| The Botanic | $1.99 | one-time |
| Pod | $2.99 | one-time |
| Spectral Suit | $3.99 | one-time |
| Chromus | $4.99 | one-time |
| Ayianna | $6.99 | one-time |
| Unlock Ad-Free | $7.99 | one-time |

**What reviewers like**

- 🌟 Beautiful graphics and visuals
- 🎶 Relaxing and soothing music
- 🧠 Challenging and stimulating puzzles
- 🆓 Free hints and no pay-to-win mechanics
- 🕹️ Simple but unique gameplay mechanics

**What reviewers complain about**

- 🤏 Small touch targets, especially on larger puzzles
- 🤔 Difficulty in distinguishing markers from lights
- 🔋 High battery consumption
- 🐛 Occasional crashes and glitches
- 📉 Lack of progress tracking or replay options

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/otteretto/id1608448950)

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.

**Highlights:** Unique palindrome puzzle mechanics, Five endlessly replayable game modes, Daily global competition, Logical reasoning puzzles, Competitive cross-platform leaderboards, No ads or microtransactions

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Upgrade | $2.99 | one-time |


## Frequently asked questions

### Is ilu free?

ilu is free to download, with in-app purchases available.

### Is Otteretto free?

Otteretto is free to download, with in-app purchases available.

### Which has better reviews, ilu or Otteretto?

Otteretto is rated higher. ilu averages 4.7 out of 5 from 2.1K ratings, while Otteretto averages 5.0 from 8 ratings.

### Do ilu or Otteretto have ads?

Neither ilu nor Otteretto shows ads.

### Which is updated more often, ilu or Otteretto?

ilu ships an update every 3 weeks, and Otteretto every 9 months. Most recently, ilu was updated on September 10, 2026 and Otteretto on June 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*