Implementing the Singleton Design Pattern in Flutter
singleton design pattern•Jan 23, 2026

Implementing the Singleton Design Pattern in Flutter

The Singleton Design Pattern ensures a class has only one instance and provides a global point of access to it. It's widely used in mobile apps, backend systems, and Flutter applications for managing shared resources.

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Original source

Key summary

This article explores the Singleton Design Pattern, its implementation in Flutter/Dart, and its variations (eager, lazy, and factory).

TL;DR

  • The Singleton Design Pattern ensures a class has only one instance.
  • It's used for managing shared resources across an application.
  • There are two major ways of creating a singleton class: Eager Instantiation and Lazy Instantiation.
  • Eager Instantiation creates the instance at load time, while Lazy Instantiation creates it on demand.
  • Factory Variations provide an alternative way to implement the Singleton Pattern.
  • The Singleton Pattern is widely used in mobile apps, backend systems, and Flutter applications.

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