Shikshak is a free Android app developed by CommLab India for the CISF NISA Learning Centre. It is an educational and reference app that provides comprehensive learning material for the Central Industrial Security Force (CISF) personnel. The app covers various subjects that are essential for the professional development of the CISF personnel, such as security management, disaster management, industrial safety, and soft skills.

The app has a user-friendly interface that allows easy navigation and access to the learning material. The content is presented in an interactive and engaging way that enhances the learning experience. The app also provides regular updates to the learning material to ensure that it is up-to-date and relevant.

Overall, Shikshak is an excellent learning app that provides comprehensive and engaging learning material for the CISF personnel. It is a must-have app for anyone who wants to enhance their professional skills and knowledge.