In another thread on r/androiddev someone said that they knew of a notes app that had a million installs, $1800 in monthly revenue, but was still probably unprofitable because firebase costs were at least that or more. I know that some companies could be profitable earlier but they choose not to like $AMZN did at one time. I'd like to hear your stories about when your app became profitable and why did it happen then/or why you chose to then