To run it on the device you will need a device with both these components installed. The best option is to use smart installer with your app. It will automatically get the required Qt libraries.

Thank you for your answer! I’ve never heard before about smart installer.

But now there is another problem with self-signed app. It seems ok –

but when I am trying to install .sys file to my test phone, installer says that there are missing libs and doesn’t offer to download it. What is wrong with it? Does self-signed apps have restriction while using smart installer?

you meant sis file right. Also have you embedded the smart installer in your sis. Or else you can try installing the Qt libraries separately or directly embed Qt sis file into your package.

But for final deployment smart installer should be used.