In Leon, there had been a presumably valid warrant issued at the time of the search; in this case there was none.

The ruling involves a Fourth Amendment case, the requirement of obtaining a valid warrant in searches by law enforcement.

The agents had a valid warrant, and used procedures that minimized the chance of taking unrelated legislative materials.

The cops who raided the apartment had a valid no-knock warrant.

The government can gain access to Google's data storehouse simply by presenting a valid warrant or subpoena.

Security tried to stop them until they showed a valid warrant for the heir of Carson Sobol.

The general rule under the Constitution is that a valid warrant is required for a valid search.

For one thing, they can't simply invade your privacy in this manner unless they have a valid warrant issued by the courts.

If "you" are the police with a valid warrant, you'd get the information, as you should.

Now, if this particular application is tracking the location of the user, without a valid warrant, then that may be illegal soon enough.