No, IPAD does not have the Twitch IOS app installed by default. In order to get Twitch onto your ipad you will have to go to the apple app store and install it.
Follow theses simple steps in order to get the Twitch App on your Ipad!
Step 1:
Click on the App Store button
Step 2:
Click on the search feature on the app store
Step 3:
In the text box enter Twitch then press the search button
Step 4:
Press the "Get" button for the Twitch Live Game streaming section that is also noted as editors choice. See this screenshot to verify what the app looks like in its current form on the app store.
Step 5:
Press the install button
Step 6:
Once it finishes installing you can press the open button which will then start up the app.