Google Keep isn't compatible with my phone/ device.

[Android Central Question]

I have J7 Prime, I tried downloading the Google Keep but it always says 'Download pending' I tried using share it to have the Google Keep but then it keeps saying 'app isn't compatible with your phone.' I'm really upset because I have loads of files stored in there. Out of all the Google apps like Gmail, Google Drive, Google Play installed in my phone, what makes Google Keep different from them? Why can't it be installed in my phone?