I'm searching for a free mind-mapping software for both Windows and Android. It should be able to sync my mind-maps across all devices.
The only feature that is a must-have (basically what every piece of software of this kind does) is that it should be able to create and arrange cloud-graphs.
There are several ones, like Simplemind, Mindjet, etc., but it looks like there is none which is completely free for mobile and desktop. Does anyone know one?