To Make Invisible
From the Side menu, find the number/category that you wish to turn invisible and click “Options”. Near the bottom of this list you’ll see “Stealth Mode”, tap the slider.
The following screen shows information about Stealth Mode (read it, it’s really important!) — tap 'Continue'.
Enter a 4-digit password to hide this number. Then confirm it by entering again.(Remember to pick something memorable!).
You’ll be taken back to the Side menu, but now the number/category will say “Stealth is enabled”, and it’ll have an extra button to tap — “Press to hide”. This does exactly that and makes your number invisible. Just like magic!
To Make Visible
"For Android Users"
Open the app, next pull down on the Side menu, you will then be prompted to enter the 4-digit password that you set up for that number. Boom! Your number is back!
"For iOS Users"
Open the app and pull / swipe down from the top of the screen. You will then be prompted to enter the 4-digit password you chose when turning Stealth mode on. Your number will now be visible in the app again.
Major Warning! Do NOT forget your 4-digit password! This password is so private that the only person who knows it is you. So look after it!