I am creating an iOS application to be released on the AppStore that uses what I consider to be generic app icon images. These images are used for buttons to navigate to different ViewControllers. I found the images by doing a quick search on google images and I'm pretty sure they are available for free use. I was just wondering if there is going to be an legal problems that I would run into when using these sorts of images.
Here is a list of icon images that I use:
1. A calendar icon (http://simpleicon.com/wp-content/uploads/Calendar-1.png)
2. An info icon (http://png-1.findicons.com/files/icons/2315/default_icon/258/info.png)
3. A people icon (http://cdn.flaticon.com/png/256/27825.png)
4. A map icon (http://simpleicon.com/wp-content/uploads/map-7.png)
5. A handshake icon (http://esscoagm.macengsociety.ca/wp-content/uploads/2013/07/icon.png)
6. A book icon (http://eastersundayservice.com/wp-content/uploads/2014/03/Open_Book.png)
