For Siri to be really effective, it has to learn a great deal about the user. If it knows where you work, where you live and what kind of places you like to go, it can really start to tailor itself as it becomes an expert on you individually. This requires a great deal of trust in the institution collecting this data. Siri didn’t have this, but Apple has earned their street cred.

Developers are realizing that they can deliver amazing experiences when they understand more about the user. However, users today are careful to not give away too much of that information. With Apple’s strong reputation behind it, there’s a massive potential for success here.

The lead developer of the original Siri app on the importance of background information to making the app work.

Curious how Facebook, Google and Apple are taking such different approaches toward building trust of their users.