InVision allows you to create a realistic experience of interactions between your sketches and layouts. Its rapid prototyping environment lets you quickly link UX/UI sketches, digital wireframes and even high-fidelity designs to test how your mobile app works and share with the rest of your team. Using hotspots to click around the screens, you can create a realistic experience of the interactions. You can leave comments and feedback on each project, either public or private, and mark each discussion read or complete once it's been viewed and dealt with. For iOS it can even include a custom home screen and custom loading screen.