FL Studio is a professional digital audio workstation (DAW) that is not legally available for free in its full version. The official website offers various editions of the software, each with different features and price points. To use FL Studio legally, you need to purchase a license. There are occasionally trial versions available, but these typically have limitations and are intended to give users a taste of the software before they commit to buying it. Be cautious of unofficial sources claiming to offer the full version for free, as they might be illegal or harmful to your computer.