I don't see a resemblance? Is any app that tracks multiple packages a knock-off? I don't think so. And I've been using original Delivery Status (as an OSX widget) before there even was App Store.
You don't see a resemblance between two apps that display package tracking details using custom whole-color list backgrounds and identically positioned iconography using similar glyphs? Between this:
Delivery Status colors it's bars according to tracking provider's official colors (brown for UPS, purple for FedEx etc.) and uses provider's logos.
Parcels colors it's bars seemingly randomly to differentiate between them and uses some off the shelf icons for different package statuses.
Where the fuck do you see the resemblance? Only in the fact that it puts different packages into different bars and colors them differently? Should it display a Cover Flow for packages or something to differentiate itself?
Anyway, I like Delivery Status more myself, but accusing Parcels of plagiarism is idiotic.
It is clearly trying to copy it. The UI original and doesn't look native to andriod or iphone. You think its a coincidence it looks so similar to another delivery tracker. Just because the icons are worse and the colors are not useful doesn't stop it from being a ripoff. I agree that it is not illegal but it is in bad taste.