Why does my Samsung s5 say, " Your device isn't compatible with this version"?

[AC Question]

I currently have the Samsung s5 and everything has been okay except for my screen going black once in a while but the phone is still on and you can hear it on and lights up. Anyways that's not the problem, I can download every other app but Pinterest. P.S. my phone is up to date. Thank! C:

 

[the tall guy]

For some reason the mustn't be compatible with your phone. You could try contacting Pinterest and finding out why, or Google searching Pinterest and compatible devices.