Kitesurf Buddy is a free Android app developed by bitpipeline that aims to assist kitesurfers in choosing the right kite and board size to use based on their weight, wind speed, and desired power level. The app also includes a wind speed unit converter that supports most speed units.

The calculation of the kite size is based on the data provided by several websites such as Surfer Today, Virginia Power Kites, and James' Blog Kite Size Calculator. The results provided by the app are very similar to the results obtained from these websites.

The developer encourages feedback from kitesurfers to improve the app's accuracy. The app also has an "Email Developer" link to allow users to directly contact the developer with feedback and suggestions.

Overall, Kitesurf Buddy is a useful tool for kitesurfers to make informed decisions about the kite and board size to use before hitting the water.