It's because one app is made by an engineering enthusiast. The other app is made by a company whose primary field isn't software, the executives are most likely

It's because one app is made by an engineering enthusiast. The other app is made by a company whose primary field isn't software, the executives are most likely wholely inexperienced with software development and/or sometimes nepo hires who then proceed to hire yesman middle managers or even outsource app development.