In Apple's Messages app starting with iOS 7, a green bubble surrounding the text means the incoming message came from a non-Apple phone that uses the standard SMS/MMS text messaging system (see SMS).

The bubble pops at the top. Green will index within the mainstream ... A new lexicon is being introduced, and the oft-bastardized "eco-" is thrown into the marketing mix as a way to "green-up" ...

The image of people lined up outside the Apple Store on the day ... Sometimes, it even makes us more judgmental, hence the whole green-bubble bias. We see the things we have as an extension ...

reactions showed up as separate messages, and group chats were impossible to manage. It was so bad for so long that it became ingrained in our collective psyche: blue bubble, good; green bubble ...