Last updated: August 13, 2026 · Hỗ trợ bằng tiếng Việt
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I reply within 2–3 business days. When reporting a bug, please include your device model (for example iPhone 14), your iOS version, and what you were doing when the problem happened.
Two devices are required
The app connects two devices directly, so it cannot be used on a single device. On one device the room list stays empty — that is expected behaviour, not a failure.
Playing a game
- Put both devices on the same Wi-Fi network, or enable Bluetooth on both.
- Launch the app on both devices.
- On device A, tap TẠO PHÒNG MỚI (Create room) and confirm the room name. Device A now waits for an opponent.
- On device B, the room appears in the list within a few seconds. Tap it.
- Both devices enter the board. Device A plays White and moves first.
Tap a piece to see its legal moves, then tap a highlighted square to move.
Frequently asked questions
The opponent's room does not appear
- Check that both devices are on the same Wi-Fi network, or that Bluetooth is enabled on both.
- Open Settings → Cờ Vua P2P and grant both Local Network and Bluetooth permission.
- Public and guest Wi-Fi networks (hotels, cafés, corporate guest networks) usually block device-to-device traffic. Turn Wi-Fi off and use Bluetooth instead.
- Quit the app completely on both devices and reopen it.
The connection drops mid-game
The app retries on its own. If the MẤT KẾT NỐI (connection lost) dialog appears, tap THỬ LẠI (retry). Moving the devices closer together helps. The game is still saved under VÁN ĐÃ CHƠI (past games) for replay.
A room shows "ĐANG CHỜ" but joining it fails
The status label is not updated once a room has both players, so a game in progress still reads "ĐANG CHỜ" (waiting). Joining it will wait and then time out. This is a known limitation — ask the host to create a new room.
Can I play against someone far away?
No. The app only connects two nearby devices over the local Wi-Fi network or Bluetooth. There is no server, so there is no online mode.
Where is my game data stored?
On your device only. Uninstalling the app removes it. See the Privacy Policy.
Changing the language
Tap the VI button in the top right corner to switch between Vietnamese and English.