I can tell you that hosting them on your server doesn't mean you own the copyright to them. For instance, the bottom right picture of the yarn on the second screen shot comes as a pre-loaded image on the Samsung Galaxy Note 4 (meaning they own the rights, via one method or another).
I'm not sure what your source for these images was, but (if you're not going to use images you created yourself), might I suggest that you find images with a Creative Commons license that permit commercial use (not all of them do). It would also be wise to keep documentation of this licensing status for all images used in this manner in case your use of them is ever questioned. If you find images you like that have more restrictive licensing, there is always the option of contacting the owner of the image and requesting permission to use it (be honest about your intentions, as misrepresentation could result in copyright infringement), or you can offer to purchase a license to use it (including purchasing exclusive rights, meaning you become sole owner and no one else can use it without YOUR permission). Keep in mind that purchasing only a license to use does not transfer copyright to you.
For this type of project, it would be a great benefit for you to research intellectual property rights and related infringement qualifications and laws.
— modified on Jan 10, 2016, 1:05:22 AM
