Most courses still ship with a box of 3 or 4 audio CDs.
Assimil audio is designed around the "sentence" rather than the "word." Many apps focus on matching words like "apple" or "boy." Assimil focuses on chunks of language. By listening to the audio, you internalize grammar without explicitly memorizing rules. You hear how a verb reacts to a specific pronoun within a sentence. This is known as "pattern recognition," and it is far more effective for long-term retention than isolated vocabulary drills. assimil audio
The modern iteration. The app includes the audio synced to the text. Most courses still ship with a box of 3 or 4 audio CDs