It has the added advantage of being two applications in one: log in with your "safe" password and you have innocent PIN functionality - you can create and edit quick reminders of passwords, PINs and credit cards.
Log in with your enhanced password and you have all that plus full contact and communication management. Create contacts, send and receive phone calls and SMSs which never appear in your phone history - they can only be seen when you log in with your enhanced password.
So whatever secret uses you find for PINCushion it can always show an innocent face.
PINCushion asks for a lot of scarey permissions because it's reading and writing your call and text history. However this data is only ever written to a local database, encrypted against your chosen password(s).
Hide selected contact, call and SMS history. Manage passwords and PINs.