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VOI - puzzle game

VOI - puzzle game

1 + 1 = ?

224 ratings
279 reviews
#163 in paid Family
🎮 Games
📚 Education
👪 Family
🧩 Puzzle
$0.99

Details

  • Released
  • Updated
  • June 15, 2016
  • July 14, 2021

Developer

GAMEBRAIN YAZILIM TEKNOLOJILERI ANONIM SIRKETI
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VOI - puzzle game video #1 for iPhone
VOI - puzzle game screenshot #2 for iPhone
VOI - puzzle game screenshot #3 for iPhone
VOI - puzzle game screenshot #4 for iPhone
VOI - puzzle game screenshot #5 for iPhone
VOI - puzzle game screenshot #6 for iPhone
iphone
ipad
📉no. 163
Charts↘︎
📌Ready
Reviews summary↘︎
⭐279
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

Engage your mind with a unique logic puzzle game. Solve challenging levels that defy conventional arithmetic, using XOR logic to determine correct answers. Features a minimalist design and dozens of levels to test your intellect.

✓88 mind-bending levels
✓XOR logic puzzles
✓Minimalist design
✓Multiple language support
✓Exclusive for iOS
Show original description

What users say

Summarized from real user reviews of VOI. Based on 224 reviews and a 4.6/5 average, it highlights the 5 positives and 3 negatives reviewers mention most about this game.

Positive things

  • 🚀Fun and engaging
  • 👍Great, minimalist design
  • 🎶Soothing, relaxing music
  • 💡Unique puzzle concept
  • 👍Challenging but not frustrating

Negative things

  • 🐛Pieces can be difficult to control
  • 🔋Drains battery quickly
  • 🔇No option to turn off sound
See all reviews

What's New in VOI

1.1.4

July 14, 2021

* bug fix

Charts

Top Paid

📉 163-7

Family games

This game dropped -7 positions in Family games chart.

Last updated on July 30, 2026.

User reviews

Most RecentHighest RatedLowest Rated

RECOMMEND

Fun; great, but sadly only 89 levels kinda expect more levels and some higher difficulty.
theonewho gotawaytheonewho gotaway

Güzeldi

Sakin hafif bir müzik, reklam tarzı rahatsız edici şeyler yok, renkler siyah ve beyaz. Gözünüzü beyninizi hiçbir duyuyu yoracak bir şey yok. Çok sevdim. Keşke daha çok bölümü olsaydı.
coronakor'onacoronakor'ona

可以更新關卡嗎

88關就結束了 很好玩 可以繼續更新嗎 😍😍😍😍😍
晴👻晴👻

Рекомендую

Игра полный восторг! Все гениальное просто, нужно только немного пораскинуть мозгами.
солнышкинасолнышкина

An Engaging and Therapeutic Gaming Experience

What I love about this game is how engaging yet truly casual it is. I can play whenever I feel like it, with no pressure from daily tasks. It encourages focus, which I find incredibly calming and therapeutic. After a couple of months, I completed the game and thoroughly enjoyed the experience. Now, I’m excited to purchase more games from the same company. Thank you!
Show more
Jjjjjj88876Jjjjjj88876
See 274 more reviews

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User experience

🐞

Reported Bugs

2 issues

Game resets to earlier level on restart

Bug

Compatibility issues with newer iOS versions

Bug
✨

Requested Features

4 requests

More levels and increased difficulty

Feature

Option to save progress across devices

Feature

Ability to pause and resume puzzles

Feature

Level editor to create custom puzzles

Feature

FAQ

What kind of puzzles does this app offer?

This app features unique logic puzzles based on XOR logic, where conventional arithmetic rules do not apply. For example, it explores concepts like '1 + 1 = 0' and 'black + black = white' being correct under XOR logic.

How many levels are there in the game?

The game offers a substantial challenge with 88 mind-bending levels. These levels are designed to test your intellect and understanding of the XOR logic system.

Is this app free to download and play?

Based on the provided information, this application is a paid app. It does not appear to have in-app purchases or advertisements, suggesting a one-time purchase for the full experience.

What platforms is this app available on?

This game is exclusively available for iOS devices. It is designed for iPhones and is intended to challenge human brains.

What are the main benefits of playing this puzzle game?

Playing this game provides a mental workout by engaging your brain with unconventional logic problems. Its minimalist design and numerous levels offer a unique and intellectually stimulating experience for puzzle enthusiasts.