Use a variable to add the costs of premium features that are selected or deselected using an iOS switch component. See a video of how to do this step-by-step in this webinar: https://support.proto.io/hc/en-us/articles/115001585411-Model-advanced-prototypes-that-use-variables-part-II TAGS: variables variable math addition switch switches fire an items event

Zero inbox example using the 'Slide to Delete' pattern

A project which simulates a collision between 2 objects. Freely drag the objects onto each other in order to have their core color change when colliding.

Music App project Design Credits: https://www.sketchappsources.com/free-source/2847-apple-music-app-sketch-freebie-resource.html

Movies & Series App project Design Credits: https://www.sketchappsources.com/free-source/2896-sample-iphone-x-movies-app-sketch-freebie-resource.html

A Simple recreation of the Messenger bubble using Proto.io stock images. Basic functions such as drag/drop to screen corners, drag to the bottom to delete, swipe down to reveal 'contents hidden' to bring the bubble back to the screen and tap bubble to show conversation.