A couple of people have mentioned Raptor: Call of the shadows, which was an absolute favorite of mine. Skyforce Reloaded is pretty close in terms of gameplay. I wish there were more games out there like Raptor

I believe part of the difference between the two apps is Apollo had yearly subscriptions users which Reddit didn’t seem to want to accommodate for, so he would have been on the hook paying for those users. While Narwhal just had a ad unlock making it easier to move to version 2 with a subscription.