I want to make an app like this

I want to make an app when you want to download an apk and then downlaod it on the file


For example like this
Obviously it wont work
Im showing you an example like this to work without using any extenston because some might be harmful

What brings you to that conclusion ?

Have you searched the extension directory, where extensions are provided by respected developers on the main platforms ?

https://puravidaapps.com/extensions.php

I realised some extenstion could hack the device or be harmful.
So using the component from the mit app inventor could be safe

Unless the extension modifies or uses its own APK, it can't really harmful

You might want to provide an example of how that might happen ?

I mean its possible, but it's hard to make into an extension
Like the extension would have to decompile, edit dex files, edit jar files, then recompile it.
Or the extension could just use its own APK. Which would be too obvious.