How to save cache in device Flutter

Another best way for caching in flutter is the use of the hive. And it retrieves data faster than Sqflite and Shared preferences

For example, you can check this GitHub repo:https://github.com/shashiben/Anime-details

This will show how to cache the rest API data into the hive and for the next time it will show data from the hive.

I think this answer helped you

Yeah i'd recommend the sqflite package for flutter, i've just figured out how to use it to solve this same issue! I learnt it using this YouTube video: https://youtu.be/1BwjNEKD8g8.

Try shared preferences https://pub.dev/packages/shared_preferences,

Just Decode your response as string and save to sharePreference, and Encode that String to Object when you need.

import 'package:shared_preferences/shared_preferences.dart'; 

//storing response as string
SharedPreferences sharedPref = await SharedPreferences.getInstance();
            Map decode_options = jsonDecode(jsonString);
            String user = jsonEncode(User.fromJson(decode_options));
            sharedPref.setString('user', user);//storing

//getting string and converting into Object
SharedPreferences sharedPref = await SharedPreferences.getInstance();
            Map userMap = jsonDecode(sharedPref.getString('user')); //retriving
            var user = User.fromJson(userMap);

    class User {
      final String name;
      final String age;

      User({this.name, this.age});

      factory User.fromJson(Map<String, dynamic> parsedJson) {
        return new User(
            name: parsedJson['name'] ?? "",
            age: parsedJson['age'] ?? "");
      }

      Map<String, dynamic> toJson() {
        return {
          "name": this.name,
          "age": this.age
        };
      }
    }