Prices range from $15 -$40 a month depending on your need
Web, Desktop, Mobile
UXPin is ideal for prototyping web or desktop apps that require lightweight interactions, but has libraries to support mobile apps and wireframes as well.
Prototypes can be created from existing mocks, Photoshop files, Sketch files or by building screens out within UXPin using extensive UI libraries. (Photoshop and Sketch file support still seems to be in early stages)
Robust library of UI elements for many different devices.
Quick and intuitive to add assets via drag + drop or uploading files.
Fine-grain controls for adding interactivity to individual elements.
Collaborative features allow multiple people to edit/review a project.
Works with Photoshop and Sketch files via plugin (although still early stages)
Steep learning curve; not easy to use for a first-time user.
Some design properties and controls did not behave as expected.
Limited interactivity options and no hotspot element (simulated hotspots by creating transparent boxes).
No options for adding animated transitions (eg. swipe, fade, etc.).