Illustration: Rebecca Zisser/Axios
The biggest smartphone apps are all launching "dark modes" for users to be able to use their phones at night without hurting their eyes.
Why it matters: Dark mode reduces glare at night and saves battery life.
Facebook appears to be testing a dark mode after the company promised it in April. In April it launched the feature on its Messenger app.
- Gmail's dark mode began rolling out to users last week after teasing it a few weeks ago.
- Instagram is beta testing a dark mode for Android as of last week.
- Twitter has had a night mode since 2016. It introduced an even darker mode earlier this year.
The big picture: A bunch of apps have rolled out dark modes over the past three years, including Reddit, Slack, weather apps and Waze.
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