Whispersync is spelled W-h-i-s-p-e-r-s-y-n-c. Hope this helps.
IPhone does not come equipped with narration for the Kindle app. However, you can download and equip Whispersync from Amazon to add narration to your Kindle app.
Amazon sells the 17 volumes of La Corda D'oro within the Kindle Edition format. You can download the e-book onto any electronic device that is equipped with the WhisperSync app.