On radioambulante.org you can listen to all of their stories, and view the transcripts and English translations for them. If this is everything you need, then you don't need Lupa.
Lupa employs the Jiveworld Method, specifically for ear-training and quickly expanding your vocabulary. Features like selective redaction, time-stretching, tricky bits, listening workflow tracking etc. as well as added content (chapters, hints, and notes) are organized in a way so that everything is at your fingertips, and travels with you in your pocket wherever you go. This helps you get further with much less time and effort. Our goal is to get you to Spanish fluency as fast as possible so you can stop studying and live the language in the real world.