Does Apple approve widget-only iOS apps? Does anybody know if Apple will approve an app whose sole purpose is to provide one (or several) today widget(s)?

Somehow I have a feeling that they won't, but the fact that keyboard-only (or crappy non-keyboard emoji apps) exist makes me wonder.

Does anybody know of any similar app that has been rejected or approved?
See the topic I mentioned earlier and search on the page for 'collection of widgets' but here are a few widgets in the App Store which contain multiple widget in one app and work on the Notification Center for iOS8 or higher devices:


Widgets Pro
Wdgts
Widget
Vidgets
Widgets Pro
OneWidget
Widgets.
My Widgets
Widgets - Calculator, Currency and Calendar