After trying out Zero Inbox with the $ 3 plan, I purchased the most expensive plan ($ 25), but at about a little more than 16000 emails in my Inbox, the app seems stuck: I only get various “searching” messages but nothing happens. That’s the case for several days now. I tried to contact Zero Inbox through email but for each email address I find, I receive the response that “this address does not exist.” I tried to contact Zero Inbox through Instagram, but my message remains unread.