Yeah Android user here. Always frustrating when it's iOS only when as you said, Android has 85% global market share. The usual rebuttal seems to be "iOS users are more sophisticated or wealthy, we'll release Android later".
That actually can be a valid argument IF your revenue model is heavily skewed toward IAP or you are charging up front for the app. But for a free social media app whose sole purpose in life is to get as many active users as humanly possible, it's absurd not to have an Android version when it represents most of the market.