Android 7 dark mode?

[Edward78]

How can you turn it on system wide, I heard you could per-release?

[Ksandur]

I am not sure exactly, but I was able to enable it on my old Huawei by downloading a third-party app called Dark Mode.

https://play.google.com/store/apps/details?id=systems.maju.darkmode&hl=nl&gl=US

It might just work.

[Edward78]

Not  supported by text free.

[Darkseth]

Which phone is it?

 

Android 7 does not have a Dark mode. It came with Android 10.

In Android 9 it's possible to do something in developer options.

 

Android 8 and older, nothing kinda. Either you have luck because your Phone manufacturer has one included (Huawei, Samsung etc), or you could try something like this: 

https://play.google.com/store/apps/details?id=systems.maju.darkmode

 

Other than that: You're out of luck sadly.