Can you give an example of when it is appropriate to use the SharedPreferences mechanism for storing settings?

SharedPreferences in Flutter is used for storing simple key-value data that needs to persist across app launches.

Suitable for storing settings like:

• Theme choice (light/dark)
• First launch flag
• Preferred language
• Notification toggle state

Example:

final prefs = await SharedPreferences.getInstance();
await prefs.setBool('isDarkMode', true); // save setting
bool? isDarkMode = prefs.getBool('isDarkMode'); // read setting

SharedPreferences is suitable for small amounts of data that do not require complex structures or security.