Android phones, apps and tablets

What security toolset, out of interest?

• AdAway - Control of hosts file to block all adverts and intrusive tracking.
  
• XPrivacy - Per-app control of permissions (access to contacts, accounts, internet, etc).
  
  

Basically none of the apps I use talk to stuff I don't want them to, and none of them make requests to anything that tracks me or shows me adverts.

Even something like the Guardian app... no adverts, no cookie store, no app metrics being fed back, no access to accounts, no access to contacts.