KNIP is a free Android app developed by Twelve that falls under the category of Business & Productivity with a subcategory of Finance. It allows users to top up their credits online on their KNIP account and view all their transactions. Additionally, users can use their KNIP account at various locations of Twelve such as sports clubs, business caterers, stadiums, and events. They can inquire whether they can pay with their KNIP account at these locations.

The app is user-friendly and easy to navigate. Users can easily log in to their KNIP account through the app and top up their credits in just a few clicks. The app also provides a clear overview of all transactions made through the KNIP account which helps users keep track of their expenses. Overall, KNIP is a convenient and efficient platform for managing credit top-ups and transactions.