It is a simple password managing app for android that basically manage password. By storing them in your local storage. It is just like storing a password in pure txt file. But, with graphical interface. So, It as secure as store your password in txt file. Basically, It is high insecure & veneruable to external bug attacks.
So, please be very sure before, share your real authentication infomation with passcode app. Also be aware that app is license under MIT licence.