[hulitu]

> The permission model is what makes these operating systems so secure

My definition of security is that programs have access on a need to know basis. Especially to my files. On Android is all or nothing.

[charcircuit]

That's not true. Android apps start by only having access to an app specific directory. In order for it to gain access a file or directory outside of that it needs to be selected by the user explicitly. There are also directories like the download directory which apps can't read from. For more information look up "Scoped Storage"