Flappy Bird (iOS)
Used by 2 peopleen.wikipedia.org ↗

“I stopped updating the iOS when there was a big change that would make some of the older app store games, like Flappy Bird, not work, so it has some historical artifacts on it and also still has a pretty steady battery life.”
Emilie Reed Interview, Writer, games historian · via Uses This 
“I'm still addicted to Flappy Bird, and my high score is 81, which I'm both proud and ashamed of.”
George Nachman Interview, Software developer (Google Search App, iTerm2) · via Uses This