D-Happy is a mobile app developed by PTT Digital Solutions Company Limited, available for Android users. It is a free app that falls under the Business & Productivity category. D-Happy is designed to help companies with their communication and leave request processes.

One of the main features of D-Happy is its phonebook function, which allows employees to contact each other easily. This feature can help improve communication within the company and make it easier for employees to coordinate with each other. Additionally, D-Happy offers a leave request feature that enables employees to request leave plans directly from the app.

D-Happy is suitable for any company that wants to improve its communication and leave request processes. However, interested companies must contact the developer in Thailand to obtain an account. The good news is that the app is completely free, and users do not need to pay to obtain an account.

Overall, D-Happy is a simple and useful app for companies that need to streamline their communication and leave request processes.