Attentive readers will know that Google Maps is included among these routing apps, which means that you can actually use this trick to get directions via Google Maps using Siri.
Siri audio output. If your car has a built-in speakerphone, or if you have a Bluetooth accessory that has a microphone and speakers, you can choose which one Siri listens to for commands. When you click and hold the iPhone's Home button, you'll see a speaker icon to the right of the main Siri button. Tap it, and you'll get a menu of all the various sound inputs your iPhone can use; select the one you want, and Siri will listen using that microphone and, if possible, give its feedback via those speakers.
Your own private IMDb. You probably already know that you can use Siri to get information about what's playing at movie theaters near you. But Siri's also in expert in pretty much every motion picture ever made. That means you can ask questions about your favorite films, but you can also make Siri do more of the legwork for you when, say, you're curious about which films specific actors have appeared in together. You might ask, "What movies star both Susan Sarandon and Tim Curry?" And Siri will, in turn, reply with both The Rocky Horror Picture Show and Rugrats In Paris.
Get movie reviews. Not sure if a given movie is worth your time? Just ask Siri: "Is Rugrats In Paris any good?" Siri replies with a review from Rotten Tomatoes.
Editing Siri. Sometimes Siri doesn't understand you quite right. Maybe you told it to call your friend "Aaron" and it thought you said "Erin." Fortunately, you can fix Siri's mistake; after Siri reports that she doesn't know what you're talking about, scroll up and find the speech bubble where Siri records what it thinks you said. Then tap that bubble, and you'll find that you can now edit what Siri heard and resubmit your request.
If you don't want to bother typing out a long correction, you can also use iOS's built-in dictation feature to enter your corrected text. Just tap the microphone in the keyboard and speak your text aloud. We'll give you time to make your own Inception joke about using Siri to fix Siri.