Steven's app in that tweet is completely different [0], the reason he reached out to Josh wasn't because it was the same app, it was because he was unintentionally getting the traffic that should've been going to Josh just due to a name clash and didn't want to profit off of accidentally "deceiving" users.
He reached out to Josh Wardle to donate the profit he was suddenly making to charity etc. It took some time but eventually Josh responded.
Now that Josh has sold his copycat game I wonder if he's going to share the income?