Save data between app launches. Use shared_preferences for small key/value settings and sqflite (SQLite) for structured datasets.
shared_preferences
final prefs = await SharedPreferences.getInstance();
await prefs.setBool('darkMode', true);
final dark = prefs.getBool('darkMode') ?? false;sqflite (SQLite)
final db = await openDatabase('app.db', version: 1,
onCreate: (db, v) => db.execute(
'CREATE TABLE notes(id INTEGER PRIMARY KEY, title TEXT)'));
await db.insert('notes', {'title': 'Hello'});
final rows = await db.query('notes');Tip: For a simpler local database,
Hive is a fast, pure-Dart key/value store worth exploring.Summary
Use shared_preferences for small settings and sqflite/Hive for structured local data.