Linutop OS is already pre-installed on Linutop machine.
Linutop OS can be purchased on USB Key or SD on Linutop shop.
Linutop OS Free can be downloaded for free. (full version can be purchased on the Linutop shop) The Free Version has no limitation, only Linutop Kiosk and linutop Configuration Menu are in demo version most features can be used the full version is available on the shop and can be installed. This can be done from the Free system, following the installation documentation.