TwoUp, as indicated by its name, is designed to fulfill a very simple purpose: make it easy to put two windows side by side. If these new features were added to TwoUp, the name wouldn’t make sense anymore, but more seriously, creating SizeUp allows us to head in a new direction with our development without sacrificing the ease of use and simplicity of TwoUp.

TwoUp will always remain free as a labor of love, but to reflect the amount of time, effort, and resources put into developing SizeUp, we are attaching a price tag which allows us to continue developing new ideas and helps defray the cost of support.