We have the world without it available for inspection. The Android ecosystem is a shambling mess compared to the quality that is availabe in the Apple Playstore. It does look heaps better on many dimensions.
Any difference in quality stems from the fact that Apple product users are more willing to pay for things. The free apps are equally bad in both stores.
Meanwhile Android allows for alternative stores like F-Droid, where you won't see the usual spam, as the apps are FOSS.