What does FreeTime do, from a development standpoint? Is there a list anywhere of functions that are disabled?
There's FreeTime and there's FreeTime Unlimited. The former is just a way to enable parental controls on supported devices: https://www.amazon.com/gp/help/customer/display.html?nodeId=201730130, and the latter is an optional subscription based service that offers content for kids: https://www.amazon.com/gp/help/customer/display.html/ref=hp_left_v4_sib?ie=UTF8&nodeId=201730150
Q: How do I participate in FreeTime Unlimited?
A: Content included in FreeTime Unlimited is curated. If you want your apps included in FreeTime Unlimited, please send an email to firstname.lastname@example.org with the following information: Your name, company/developer name, and your preferred contact information, a link to your company website, and a link to the app you would like to submit for consideration.
As for your other question about using WebView to get content, that should be possible, as long as it's not a workaround for web browsing. As for a 2 app solution -- Android restricts that, and every app sees the profile they run in as the entire device, with no way to communicate across profiles. You could try to use a server to act as a hub to share values between apps, but that would not be elegant, and as I mentioned on another thread, it's up to the vetting team to determine if such a solution is acceptable. I would strongly advise to do that as a single app that simply displays content, and that parents can control via standard OS methods, not a separate app. Thanks!
(Apologies for a late reply, there was an issue with the forum)
Thanks for posting! Think of FreeTime as a customised restricted profile: https://developer.android.com/about/versions/android-4.3.html#RestrictedProfiles
In addition to that, a few other things are disabled (mobile ads, in-app purchasing, browsing the web, opening settings, social networks, etc.) Please look through this high level overview: https://www.amazon.com/b?ie=UTF8&node=12528011011
Also check this FAQ with regards to app submissions: https://developer.amazon.com/appsandservices/support/faq#Tablets:%20FreeTime
Please note that FreeTime is available only on Amazon's Fire tablets and Fire TV (and Kindle e-readers).