Master Key ..the Mobile Applicationwill try to be a friend philosopher and guide to the candidate of competitive exams. The format of this App is that it will be an option for competitive exams. It will work on specific topics of specific exams.(Ex. Vistaran Adhikaree). Minimum Rates Maximum Material is a motto of this App. So be ready to be successful. If you have any query or suggestion please email us on [email protected] . We will upload only quality and necessary study material which is useful to the competitive aspirants.