Say hi to the new wasteof (E)ink, originally was just gonna be made for me but I guess it could be public too, made for Kobo Touch, should work on any Kobo from the touch onwards (EXCEPT the mini and the other 2 that don't get updates anymore), might work on kindle, might work on old Android/iOS, depends if you have working SSL certs and up to date TLS.
If you wanna try it, https://kobo.joshattic.us
Comments are broken, I'll fix it tomorrow, it also works on iOS 6 :)