You can email the converted book to your Kindle device, or Kindle app on your phone. Just follow the instructions on Send to Kindle By Email page
The converted books are downloaded in the SmoothPDF directory on your Android phone storage.
You can install a mobi reader from the Google Play Store to read mobi format ebooks on your phone. Search for a mobi reader
You can also read mobi format ebooks on the Kindle app on your phone. Just email the ebook to your Kindle app as an attachment, as mentioned in #1 above.
You can install a ePub reader from the Google Play Store to read epub format ebooks on your phone. Search for an ePub reader