The conversation between human and AI assistant.
What are some good iPhone Apps for learning English?
That sounds good, actually. Can you also check if any of these apps have a free version?
Sure, most of these apps have a free version with limited features, but you can upgrade to a paid version for more access. Duolingo and Lingvist have free and paid options, while Babbel and Rosetta Stone are only paid apps. Would you like to know more about pricing and features of each app?