Remove or hide add button at details on mobile app

Hi,
In order to hide this button in the detail you need to override a base method getAddAction in the controller, this is how it's done:
1) Create a new module, name it something like "UsrAddButtonRemove" and modify a getAddAction in it. Full code:

Ext.define("ContactGridPage.Controller", {
    override: "Terrasoft.controller.BaseGridPage",
    statics: {
        Model: Contact
    },
    config: {
        refs: {
            view: "#ContactGridPage"
        }
    },
    getAddAction: function() {
        if (this.isDetail()){
          return null;
        }
       return this.callParent(arguments);
  }
});

2) In the Manifest (MobileApplicationManifestDefaultWorkplace or other) add your customization to PagesExtensions of the needed object.

	"Models": {
		"Contact": {
             ----
			"PagesExtensions": [
                "UsrAddButtonRemove"
			]

3) Compile your configuration to make sure the added module is working properly.
In this example, a + button was hidden for a Contact object, but it can be modified for any object. Also note, that this works only on Classic UI pages, not Freedm UI.