# VOI - puzzle game — 1 + 1 = ?

> Minimalist XOR logic puzzle game with dozens of mind-bending levels. (iPhone/iPad app by GAMEBRAIN YAZILIM TEKNOLOJILERI ANONIM SIRKETI.)

- Source: https://appshunter.io/ios/app/voi-puzzle-game/id1110376793 (this page in markdown: same URL + `.md`)
- Developer: [GAMEBRAIN YAZILIM TEKNOLOJILERI ANONIM SIRKETI](https://appshunter.io/developer/1822763537)
- Category: Games, Education, Family, Puzzle
- Price: $0.99
- Rating: 4.60/5 from 225 App Store ratings · 279 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 12 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China), European Spanish and 2 more
- Released: 2016-06-15
- Data updated: 2026-09-07
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/voi-puzzle-game/id1110376793/reviews.md

## What is VOI?

• • • Best Games on iPhone; Russia, South Africa, Turkey, Middle East • • • 

Do you think 1 + 1 = 0  is correct? So what do you think about "black + black = white" statement? According to XOR logic, they are correct.

New, mind-bending, minimal puzzle game with dozens of levels and extra-ordinary design.




Features:
• 88 mind-bending levels
• 11 languages 
• Exclusive for iOS and human brains

Follow me:
• https://www.facebook.com/gamebra.inGame
• https://twitter.com/gamebra_in

## Key features

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

## What do users think of VOI?

Overall sentiment: positive

**Pros**

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

**Cons**

- 🐛 Pieces can be difficult to control
- 🔋 Drains battery quickly
- 🔇 No option to turn off sound

**Commonly reported bugs**

- Game resets to earlier level on restart
- Compatibility issues with newer iOS versions

**Most requested features**

- More levels and increased difficulty
- Option to save progress across devices
- Ability to pause and resume puzzles
- Level editor to create custom puzzles

## Recent user reviews (10 of 279)

All indexed reviews: https://appshunter.io/ios/app/voi-puzzle-game/id1110376793/reviews.md

### 5/5 — RECOMMEND

*2025-12-28, version 1.1.4*

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

### 5/5 — Güzeldi

*2025-07-04, version 1.1.4*

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.

### 5/5 — 可以更新關卡嗎

*2025-04-04, version 1.1.4*

88關就結束了 很好玩 可以繼續更新嗎 😍😍😍😍😍

### 5/5 — Рекомендую

*2024-12-19*

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

### 5/5 — An Engaging and Therapeutic Gaming Experience

*2024-12-05, version 1.1.4*

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!

### 5/5 — Muy buena

*2024-08-05, version 1.1.4*

Les falta actualizar

### 5/5 — Simples e interessante

*2023-09-23*

A ideia do jogo é simples. Os níveis não são muito difíceis, por isso o jogo não oferece dicas e você precisa concluir o nível para passar pro próximo. Pelo preço, tá valendo, apesar de ter poucas fases.

### 4/5 — Entertained For Years

*2022-09-12, version 1.1.4*

I would play this game on and off for few years; take breaks when I got stuck but always came back to.  Finally beat all levels.  Found the background music to be mellow and relaxing.

### 5/5 — Wunderschön - ich spiele es schon zum 2. Mal

*2022-08-17*

Optisch wunderschön, teilweise auch recht knifflig und ganz ohne Zeitdruck. Und weil es so schön ist, spiele ich es jetzt nochmal. Schade ist nur, dass es beim öffnen immer auf den höchsten jemals erreichten Stand springt (also ganz an das Ende) und nicht dorthin wo man beim letzten Mal aufgehört hat
Update:
Es ist so schön für immer mal wieder zwischendurch; deswegen:
Bitte baut einen Button „zurücksetzen“ ein, damit man es mehrfach spielen kann, ohne sich immer die Nummer merken zu müssen! Das wäre super!

### 5/5 — Devs: Please make a Voi Pt 2!!

*2022-03-11, version 1.1.4*

This game is so good, it deserves a T2-esque sequel.

## Frequently asked questions about VOI

### 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.

## Version history (last 5 releases)

### 1.1.4 — 2021-07-14

* bug fix

### 1.1.3 — 2018-01-25

This app has been updated by Apple to display the Apple Watch app icon.

• iPhone X optimization

### 1.1.2 — 2018-01-18

• iPhoneX support

### 1.1.1 — 2018-01-14

• iPhoneX support

### 1.1.0 — 2016-09-03

• 22 new levels

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## More apps by GAMEBRAIN YAZILIM TEKNOLOJILERI ANONIM SIRKETI

- [rop](https://appshunter.io/ios/app/rop/id970421850)
- [hocus.](https://appshunter.io/ios/app/hocus/id1030548464)
- [puzzlement](https://appshunter.io/ios/app/puzzlement/id1342758511)
- [hocus 2](https://appshunter.io/ios/app/hocus-2/id1532229040)
- [hocus GO](https://appshunter.io/ios/app/hocus-go/id6747082481)

All apps by GAMEBRAIN YAZILIM TEKNOLOJILERI ANONIM SIRKETI: https://appshunter.io/developer/1822763537

## Related topics

[hocus 2](https://appshunter.io/ios/topics/hocus-2)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*