Katanyu is an Android application that offers a wide variety of high-quality products for online shopping. The products are sold directly by the owners and manufacturers. What sets Katanyu apart is that for each purchase made, 5% of the net purchase amount is donated to a chosen Thai district for educational and economic development. Moreover, the donation can be used to reduce the buyer's tax, according to the conditions set by the Revenue Department.

Katanyu aims to give back to Thailand by developing two aspects: education and the economy of each district. The app provides funds for schools in every district, and also hires local manufacturers to produce goods for Katanyu.

The app's interface is user-friendly, making it easy to navigate and search for products. The app also offers secure payment methods, ensuring that each transaction is safe and protected. Overall, Katanyu is an excellent platform that allows users to shop for quality products while contributing to the development of Thailand's education and economy.