I'm going to take Goop's answer this time. Here's why:
There is no doubt about PC, iOS and Android.
I have no record about any Rayman games running on Amazon Fire Stick specifically, although Fiesta Run has been reported to run on the Fire TV in general. However, Fire TV itself if just a customized Android as far as I know.
Apple TV, on the other hand, is a separate platform, with a tailored OS (although based on other Apple OSes, it does not share the same apps).
Ubisoft Nano is, sort-of its own platform, even though it's more like a sandbox, running on other platforms like browsers and maybe mobile OSes.
Jonster was obviously correct, but alas, a slip of tongue - Windows Mobile is not the same as Windows Phone; it is a much older OS, discontinued before any UbiArt game saw the light of day.
Scoreboard
The Jonster - 6 points
PluMGMK - 5 points + Bonus
RayGamer99 - 3 points
Greengoop - 2 points
DaveRattlehead - 1 point
RayCarrot - 1 point
lyndo64 - 1 point
PC, iOS, Android, Apple TV, Amazon Fire Tablet (again, I was probably too slow on this one, even though the above response was before I even woke up. Hate it when this happens

).
Sorry! Either move into my timezone, or wait for a quizmaster in your timezone.
Or just try your luck in the upcoming picture question, since you did quite well last time.
Question 20: Look at the cute tiny pictures of cuddly toy castles. From left to right, where are they taken from?