Just drop any number of widgets on the app to install them. If the widget is not installed it will install normally. If it is already installed, you get the smart upgrade option, which will update the widget without closing any copies you already have open. This works with any widget, though it is particularly useful with Delivery Status. If you're tired of having to move your widgets back in place every time you update them, this app is for you.
Even better, you can set Smart Widget Installer as the default application to open widgets:
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