ShapPix is supposed to be an alternative social network to share images on your iPhone, but there are a number of issues here that keep it from being a viable option for most users. From the overly long setup process and convoluted interface to the lack of direct interaction you have with other users, it can be frustrating in many instances.
The first problems we encountered were in setting up ShapPix. Technically this works well, but the sign-up process requires quite a bit of information. You must supply a profile photo, as well as home country and other information that is unnecessary to share. The lack of built-in privacy functions in the free version means this information is out there for anyone to see, as well -- an issue for those that prefer to share anonymously. Nothing is stopping you from using fake information, of course, but it's still a lot to sort through on the first use. Next you can start sharing photos, taking them from your library or snapping new ones and saving them to the service. There is no clear way to connect with specific users, though there are following options. Buttons are often non-responsive on first tap, images are occasionally hidden behind other menus, and it's impossible to actually search for other photos; you can explore other users' images, but not with any built-in search tools.
ShapPix feels like an early beta for a photo sharing service, and while there are some good tools here, the design and feature sets are frustrating at times. Unless you are specifically looking for a new photo sharing service and just want to try out all possibilities, there are other options out there you will likely enjoy better.