With my move to a Roamio as a whole home system, using a TiVo mini and various iOS devices to view content in other rooms streamed from the Roamio, I'm surprised that there appears to be no parental controls for viewing via the iOS TiVo app.
Was actually a bit surprised that the Roamio settings weren't default for all devices when I set up my Mini, but could understand that...perhaps a mini is set up in a parent's room and they don't want/need to be entering a code to access content.
When I went to set up streaming for my 7 year old on his iPod, I discovered that I can stream anything from My Shows, even content that would typically require a passcode under the parental settings I use on the Roamio and Mini.
Unless I'm missing something, there's no way to limit content via the TiVo app streaming functions? There's nothing in the Parental Controls FAQ
that addresses this.