When comparing HiNative vs Bilingua, the Slant community recommends Bilingua for most people. In the question“What are the best language exchange apps for Android?” Bilingua is ranked 2nd while HiNative is ranked 4th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Get advice on pronunciation
You can ask your question as an audio upload to get tips/advice on pronunciation.
Pro Get answers not just on language, but also about different destinations
The Q&A format is quite open, allowing you to get answers from people all over the world. Along with receiving answers/advice on language questions, you are also welcome to ask questions about destinations you may be traveling to. You'll get plenty of helpful answers from locals of that area.
Pro Looks really nice
Pro Effective
Pro Efficient
You're not just chatting with native speakers, you get to practice with their bot as well. There's also a vocabulary list that lets you store words from your chats--really helps with learning the language more.
Cons
Con No private messaging to practice conversation
HiNative has a Q&A format, rather than connecting you with native speakers for conversations.