If the game runs slowly, freezes, or fails to start, try the following steps:

- Close and restart the app.
- Restart the device. Exit other running apps.
- Avoid playing while charging or on low battery.
- Use 'Clear Cache' under 'Data Management' on the Title screen.
- Switch between Wi-Fi and carrier networks (e.g., 4G/5G).
- Adjust 'Graphics' in the 'System' tab under 'Options' in the 'Menu' at the top of the CAMP screen.

The suggested operating environment for using DRAGON QUEST Smash/Grow is as follows.

Suggested environment
iOS: 15.0 or later, iPhone XS or later, devices with 4GB or more System Memory
Android: 9.0 or later, 64‑bit compatible devices (Snapdragon 855 or higher, System Memory 6GB or more)

On devices that do not meet the suggested environment, the app may not function properly or may be difficult to use comfortably.
Additionally, even when the above conditions are met, performance may be affected depending on the usage environment, and the app may not be available on some devices.