Ask HN: SaaS or mobile game?
If you were equally skilled at crafting games and and SaaS products (assume you enjoy creating both), which would likely be more profitable?
Games and Apps need to be more polished to sell (if at all) and then if you don't have new releases new sales will rapidly decline. All successful apps and games end up getting a lot of on-going upkeep.
BUT ... in either case, it really depends on the marketing investment (money and effort). It's rare to create something that just sells itself.
If your app does $10k/month that can be pure profit and not even have a website.