Every xTAK product is licensed the same simple way. You buy it once, per device — it's yours to keep and runs entirely on your own hardware. An optional yearly support subscription keeps you on the latest builds and gives you direct support.
Buy a product once for each device you run it on. It's a permanent license — install it, run it on your own hardware, reinstall it whenever you need. No internet check, no phone-home. The version you buy is yours to keep and re-download forever.
Add a flat yearly subscription per product — covering any number of devices — to keep getting new builds as they ship, plus operator extras (like 3D-printable case designs) and direct support. Cancel any time — you keep permanent access to every build released while you were subscribed.
When you buy a product, you get the current release and every earlier one — always yours to re-download, so you can roll back to an older build any time. Builds released after your purchase come with an active support subscription. While it's active you get every new build the day it ships; if you let it lapse, nothing breaks — your software keeps running and you keep permanent access to every build released while you were subscribed. You simply stop receiving new ones until you renew.
Support is per product, so you only pay for what you actually run. One flat fee covers your whole fleet for that product — whether that's 2 devices or 10.