Don't like the idea of web publishers placing cookies on your computer and tracking your behavior? You can use "private browsing" or "incognito" modes in most modern web browsers to surf the web without offering up any personally identifiable information or saving anything to your browser history.
That means your browser won't auto-fill passwords for you, Amazon won't show you items based on your past viewing habits, and you might miss out some of the other conveniences of modern browsing. But it also means nobody will be able to see which websites you visited by looking at your history.
Now the lead developer of CyanogenMod is planning to break incognito mode out of the browser. He's working on an Android tool that'll let you basically make any app incognito.
Steve Kondik says he's developing the "Run in Incognito Mode" software right now, and hopes it will be built into future versions of CyanogenMod.
When enabled, this feature will let you run apps without sharing private data with that app. It'll convince the app that your contact list, browser history, calendar, and messages are empty. And even if GPS is enabled on your phone, the incognito service will tell the app in question that it's turned off, so it can't track your location.
Kondik points out that the service doesn't block ads — it's only designed to protect your privacy. So you'll still see ads in any apps that show them… they just might not be as relevant to your interests as targeted advertisements.
via reddit
CyanogenMod could get per-app "incognito mode" for greater privacy is a post from: Liliputing