FTC might ask a court to bar Facebook from enforcing policies regarding how its apps work with potential rivals.
California state attorney general's office went to court to compel Facebook to comply with requests for information in its investigation.
Some states have raised concerns that Facebook and other tech companies engage in anti-competitive practices.
The state attorney general probe into Facebook, announced in September, is being led by New York.
The suspended apps are associated with about 400 developers, Facebook said
Kogan and former Cambridge Analytica CEO Alexander Nix have to destroy all personal information gathered.
Facebook said it may have "unintentionally uploaded" email contacts of up to 1.5 million new users