Hi Mike --
In the first and second picture, there is an attribute without a title after Longitude. That is what the white box is on Windows: the place for that attribute that has no title.
Looking at the icons in your picture, it looks like you are viewing the details of the feature on Windows, while on Android you are editing them. As such, you'll see differences: when viewing, you should be able to view the attachments if that particular feature has any. While editing, you'll be able to add and remove them.
My guess is perhaps the feature you are viewing on Windows doesn't have attachments so you aren't seeing any when viewing the details (or it does, and to see them you need to scroll farther down). But if you were to tap the pencil icon and start editing that feature, you'd be able to attach them.
Esri Education Team