This is officiall government app basically it stores your adhar details with a password ( combination of upper case letters and lower case letters a number and a special character ) you can you use it everywhere just like you use your physical adhar card it will do every work of an adhar card without hassle of carrying a physical card with you and the second feature is TOTP ( Time based one time password ) you don’t have to carry your registered mobile number with you when you want a OTP for some purpose just open the app and generate a TOTP it will work similar to a OTP.