You must be joking. There are practically no useful apps on ios or android. I can count the number I use of them on one hand, and of them a couple is bundled on any linuxbox. Granted I see my family members enjoy two or three more apps. To be generous I will estimate the number of useful apps at about twenty. Do you really want all that garbage on linux?
For your reference libs count like apps on android and ios too. It is not particularly positive to have few libs available. If you check out KDE, you will see that distribution of widgets and other stuff (like wallpapers, icons, plugins, etc) are outside the package system (in the package system you will typically find bundles of them, but only for some). So your estimate is disingenuous at best. The right answer in an apples to apples comparison is quite favourable for a debian based distribution.