User Products under LGPL-3.0
Why does it Matter?
If your product uses Qt or any other library under LGPL-3.0, it is important to know whether it is a B2C or B2B product. If it is a B2C or user product, you must allow its owner to install a modified version of Qt on the product and to run the product with the modified version. In the case of an embedded device, this implies that the owner must be able to (cross-)build Qt for the target device, install Qt on the device and to run the Qt application on the device. The owners may require passwords for accessing the device, cryptographic keys for signing the Qt libraries, an SDK and other things to exercise their rights. If you have a B2B product, none of this applies.