I see this a few times on here about DOJ or FTC stepping on to Apple like Microsoft, and I think it's pretty off base.
In order for that to happen a few things need to occur. First, the government needs to prove that Apple has a monopoly. Here are some numbers from NPD on smartphone marketshare domestically: https://www.npd.com/wps/portal/npd/us/news/press-releases/pr...
Apple: 31 percent
Samsung: 24 percent
HTC: 15 percent
Motorola: 12 percent
LG: 6 percent
So right there, it's a tough case to make that Apple has a dominant market monopoly as compared to Microsoft in 1998.
Here's a CNET article I found quickly from 1999, one year-ish after the DOJ brought their case: http://news.cnet.com/Windows-95-remains-most-popular-operati...
Windows 95 57.4
Windows 98 17.2
Windows NT 11
Mac OS 5
DOS 3.8
Linux 2.1
Windows 3.11 1.1
Unix .8
OS/2 .5
Others 1
So at that time Windows accounted for roughly: 87% of the market! And then beyond the government determining they had a monopoly, they had to show that Microsoft was abusing it's monopoly in anticompetitive ways. They concluded they were through agreements with OEMs and others to keep other software off the machines. Basically OEMs would install Windows and IE, and not make deals to install Netscape or other software. And part of that decision also had to do with the fact that in 1998-2000 as broadband was nascent in much of the country, getting new software wasn't exactly as easy as a 5 minute or less download.
And even still there are legitimate criticisms of the US DOJ case against Microsoft.
Finally though, it doesn't seem to me that this could be done by DOJ/FTC at all. Apple doesn't have a market monopoly. Since it is a device that they produce hardware and software for, and have from the beginning asserted full control over the app store, and other market alternatives (often cheaper) readily exist, I wouldn't expect any action.