From their website: “Freedom is an application that disables networking on an Apple computer for up to eight hours at a time. Freedom will free you from the distractions of the internet, allowing you time to code, write, or create. At the end of your selected offline period, Freedom re-enables your network, restoring everything as normal.

Freedom enforces freedom; a reboot is the only circumvention of the Freedom time limit you specify. The hassle of rebooting means you’re less likely to cheat, and you’ll enjoy enhanced productivity. Freedom is free, but if you find Freedom useful, please consider a donation of ten dollars to fund continuing development.”