JSAM-콜백문자Smart Auto Message is a free Android app developed by 제이예스 주식회사. It falls under the category of Business & Productivity. JSAM offers a range of features to help users with automatic messaging and group messaging.

With the "무선 자동문자" feature, users can set up automatic messages to be sent to the recipient's phone when they miss a call or end a call. Similarly, the "유선 자동문자" feature enables users to automatically send messages to recipients when calls end or during holidays.

JSAM also provides a "단체문자" feature, allowing users to send up to 500 group messages per day or 8,000 per month. This is useful for customer management and sending informative messages.

The app offers various customization options in the "설정" section, such as sender number restrictions, designated number sending, and scheduling messages based on specific days and times.

Additionally, JSAM provides free MMS images and text content for different situations, and users can even consult with professional designers to create unique promotional images.

JSAM-콜백문자Smart Auto Message is recommended for self-employed individuals, small business owners, salespeople, organizations, clubs, politicians, CEOs, and anyone looking to manage customer relationships, send informative messages, or conduct mass messaging for events and celebrations.