Recently various health care applications and systems have been developed as technological remote solutions in the medical field, as an effective and secure mechanism for continuous communication between patients and doctors through the COVID-19 epidemic and the digital transformation era. The psychotherapy critically requires incessant interaction and collaboration between the psychotherapist and their patients. Therefore, this research designs and develops an easy-to-use mobile application for both the psychiatrist and the patients in order to implement the various psychotherapy methodologies anytime anywhere. The mobile application for online psychotherapy presented in this research promotes continuously the effective collaboration and interaction between Psychiatrist, and patients. It permits Psychiatrist remotely cure and assist patients, as it permits together Psychiatrists and their patients easily interconnect via chats, blogs or posts. Through registration to this psychotherapy mobile application, patients can store their health information, search for appropriate doctor, chat with doctors, get prescriptions and consult psychology professionals. Doctors can provide their detailed information, write blogs, provide prescriptions, make effective chat with their patients and follow up the patient medical history. For assessment and evaluation, the psychotherapy mobile application; a questionnaire was conducted as a subjective evaluation technique for the usability assessment of the online psychotherapy mobile application, and it results in positive reaction from the participants.