# O vs X Duel — A strategical Tic Tac Toe game

> A strategical Tic Tac Toe game (iPhone/iPad app by Cheng-Kai Wu.)

- Source: https://appshunter.io/ios/app/o-vs-x-duel/id6748151029 (this page in markdown: same URL + `.md`)
- Developer: [Cheng-Kai Wu](https://appshunter.io/developer/1824246427)
- Category: Games, Entertainment, Casual, Strategy
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 115 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2025-07-06
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/o-vs-x-duel/id6748151029/reviews.md

## What is O vs X Duel?

---- Classic TicTacToe has evolved! ----
Face-to-face battle | Smart computer challenge

Play TicTacToe with friends anytime, anywhere, and kill time easily! Challenge two computer opponents of different difficulty levels to test your strategy and wisdom. Can you beat the computer in hard mode?

---- Game Features ----
Classic Mode
■ Play against friends on the same machine to relive the fun of childhood!
■ Or choose a computer opponent and challenge it alone anytime, anywhere.

Endless Mode
■ Both sides can only place up to 3 O or X.
■ Starting from the 4th, the oldest piece will automatically disappear!
■ The strongest strategy and tactics are required to challenge the limits of your brainpower!

Obstacle Mode
■ At the beginning of the game, you cannot place chess pieces on a random grid, which adds variables and challenges!
■ Other rules are the same as the endless mode, which tests your ability to respond on the spot.

Download now and start the brain showdown!

Whether you are playing with friends or playing against the computer, it can bring you unlimited fun and challenges. Come and experience the new gameplay!


## Version history (last 5 releases)

### 1.4.1 — 2025-10-20

Fix security vulnerabilities.

### 1.4 — 2025-07-25

■ Free to Play

### 1.3 — 2025-07-21

■ Added simulated computer thinking time
■ Fixed FPS issues

### 1.2 — 2025-07-13

■ Fixed the issue of not being able to start the game

### 1.1 — 2025-07-13

■ Added language switching function
■ Fixed the problem of playing another game in obstacle mode

## More apps by Cheng-Kai Wu

- [NovelGlide](https://appshunter.io/ios/app/novelglide/id6748090356)

All apps by Cheng-Kai Wu: https://appshunter.io/developer/1824246427

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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 2026-05-18.*