We can confirm that the following controllers work with Never Alone: Ki Edition.
iPega Telescopic controller (Android)
True Depth 3D BT motion Wireless Bluetooth Gamepad (Android)
Steel Series XL (iOS)
Steel Series Nimbus (iOS)
Nyko Playpad (Android)
We can't possibly test every controller out there with the Ki Edition, so if you have tried the game with another controller and know it's working, please let us know and we'll add it to this list.