Legacy of Flappy Bird

Since the game's removal, numerous remakes and parodies have been spawned, such as Sesame Street's Flappy Bert and Fall Out Boy's Fall Out Bird. Flappy Bird became one of the most cloned games in Apple's App Store. At the peak of its popularity, over 60 clones per day were appearing on the App Store, prompting both Google and Apple to begin rejecting games with the word Flappy in the name. CNET reviewed seven "Flappy copycats" for iOS two days after the original game's removal, describing the options as "pretty bleak", but singling out the underwater Splashy Fish as the closest approximation of Flappy Bird.

Shortly after the game's removal, security researchers warned that some versions of Flappy Bird and its imitators available on alternative Android app stores have been found to contain malware that can lead to unauthorized charges to a user's phone bills. The number matching game Threes has been compared to Flappy Bird because of the similarities between how people react to them and by the chain of clones that they are both respectively part of.

In February 2014, the non-profit computer science education organization Code.org unveiled a set of lessons that would allow the student to make their own Flappy Bird clone.

Nguyen's other games Super Ball Juggling and Shuriken Block ranked at 6th and 18th respectively on the App Store during early February 2014 on the back of Flappy Bird's success. He revealed in March 2014 that he was developing three other games at the time, in similar formats to his previous releases. One of those games was released in 2014 as Swing Copters and uses similar gameplay as Flappy Bird.

An Easter egg in Android Lollipop (version 5.0/5.1) allows users to play a modified version of Flappy Bird, entitled "L Land", involving a flying Android and Lollipops replacing the pipes. It was revamped in Android Marshmallow (version 6.0) as "Marshmallow Lad", adding multiplayer support for up to 6 players. On New Year's Eve in 2014, Google displayed an animated Google Doodle featuring Flappy Bird as one of the year's most searched phenomena, alongside the World Cup, the Ice Bucket Challenge and the Philae spacecraft. A similar game featuring Talking Tom was released as a mini-game for My Talking Tom, called Flappy Tom, and the same game was featured in Talking Tom and Friends.

In 2016, video game player and livestreamer SethBling replicated Flappy Bird within Super Mario World through code injection.

In June 2023, the dwarf mining game Deep Rock Galactic's Season 04 update put an arcade cabinet into the in-game bar containing the Flappy Bird parody game "Jetty Boot" as a "training module" for obtaining the Jet Boots players can find in the game's missions.