Create and review English or Chinese flashcards from chats with friends
If you are studying Chinese/English and like learning vocabulary, check out Hiway.
PROS: Chat with native speakers nearby via text message. Tap unknown words for a definition and add it to your flashcard deck to grow your vocabulary.
CONS: Hiway is based in China, and being in California, the nearest person I could chat with was the Apple app reviewer. The rest were 6,000+ miles away in China. The UI is a bit cumbersome: I failed flashcard review because I didn’t know how it worked and there’s no how-to tutorial.