two states

Transfer files between iOS device and computer or two iOS devices.

Transfer files between two iOS devices, between iOS and Mac

Syncs two user-specified folders.

Advanced two-pane file manager.

Presentation system that utilizes two screens.

Make percent related calculations by simply entering two values.

Determines if two files are identical.

Determine if two files are identical.

Compare two PDF documents.

Shows the golden section between any two points on the screen.