i have a hotmail mail account setup with all my emails accounts in default mail app. the problem is if someone pick up my phone to use it, can see my hotmail private account also in email app. of course i have setup a passcode lock in iphone. but if i want to give it to my wife or kids to use it in case for an emergency or play games i have to passcode unlock the phone and then they have access to all my email which i dont like. is there an extra app with passcode lock support to put there my hotmail account? i dont mean touchid. i mean a passcode mail app to open with 4 digits. i have an iphone 4.