Duplex can be good for learning English if you already understand everyday conversations and want more consistent practice. The pace feels realistic without being constantly overwhelming, with an average speaking rate of around 98 words per minute. The language mixes everyday English with a few expressions that need attention, so it works best for learners who already have a solid base. Because the plot is fairly straightforward, learners can focus more on the dialogue than on figuring out the story. If your English is close to B1/B2, Duplex can be useful for getting used to faster spoken English.
