Propellerhead has released a free update — version 9.1 — to Reason featuring the addition of Ableton Link support. Ableton Link, introduced in November 2015, allows apps on different devices to play in time with each other, using only a WiFi connection to start on the beat and to stay in tempo/synchronized. The 9.1 update also includes a number of bug fixes.
Existing Reason owners can update via the auto update feature in Reason 9.