Duolingo vs HelloChinese?

I've been using duolingo in the past for german and it was ok to learn some vocabulary and basic conversation before traveling. Also, now that I have a streak, I'm kind of addicted!

I've seen some people recommending HelloChinese on the web, but now that I've started mandarin on duolingo is it worth it to switch app or are they similar enough? (I plan on supplementing my learning other learning resources at some point of course) Thanks for your help!