I put all mine in a address book

i have put an app called dashlane and it is very secure. it will really help

I use password keeper

DU Speed Booster in google playstore is really good. I downloaded it for help on boosting my phone energy but it also comes with a security option to place password protection on some or all apps on phone. I found it very helpful.

I am old fashioned I guess..I write everything in my planner. lol