The developer of Flappy Bird, one of the most popular free mobile games on Apple Inc App Store and Google Inc's Android Play store, recently removed the game from Apple and Google App store.

The game is no longer available to download for either Apple or Google users but its fans can still have fun if they have already downloaded the game to their devices.

Flappy Bird caused a sensation after rising from obscurity to become one of the most downloaded mobile games on both Apple and Google’s online stores.

Nguyen Ha Dong, a Hanoi-based game developer, announced the grounding of the addictive game in a Tweet on Saturday. He also apologised to Flappy Bird users.

"Twenty-two hours from now, I will take 'Flappy Bird' down,” Dong said, adding that it is not related to legal issues.