Hi I am using this app from past four months.It id fully secured one.we can store upto three aadhar profile which are linked with registered phone number.It was a good intiative by UIDAI.It contains TOTP which is useful when you doesn’t recieve OTP due to your mobile prover problem or AADHAR server problem.you can download eaadhar card by using the TOTP.( TIME BASED OTP) .My suggestion is to install and use this app because it doesn’t contains advertisements.