> For the complete documentation index, see [llms.txt](https://emotiv.gitbook.io/emotiv-brainviz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emotiv.gitbook.io/emotiv-brainviz/getting_started/license_requirements.md).

# License requirements

EMOTIV BrainViz has a 7 day free trial that starts when you download EMOTIV App and BrainVi and sign in using your EMOTIV ID. After the trial, you need to purchase EMOTIV BrainViz which gives you lifetime access to the product. To purchase EMOTIV BrainViz, please visit our website at [https://www.emotiv.com/product/emotiv-brain-viz/](https://www.emotiv.com/product/emotiv-sdk-advanced/).