I'm trying to use force:recordView
and it works okay in Lightning Experience, and S1 but but when rendered in a stand alone app, the SLDS CSS are not applied - that is if I preview the sampleViewRecordApp.app as a stand alone app the page does not have the SLDS CSS styling.
sampleViewRecordApp.app
<aura:application implements="ltng:allowGuestAccess" extends="force:slds">
<c:sampleViewRecord />
</aura:application>
sampleViewRecord.cmp
<aura:component implements="flexipage:availableForAllPageTypes">
<force:recordView recordId="001A0000002GcNXIA0" />
</aura:component>