How much does the full version cost and what does it unlock?

Chants of Sennaar is free to try up until you reach the abbey in the first level, so players can see wether they like the game before unlock...

Can I get the game for free on mobile if I already own it on PC / console?

Unfortunately not: the mobile version is a fully-fledged version, requiring many months of work to optimize and adapt it to the needs of mob...