ltunify is described as 'Logitech’s Unifying technology is awesome. Plug the USB receiver in the computer, power on your keyboard or mouse and it is ready for use! Well, the devices themselves do work, but software to attach new devices to a single receiver (or detach bound devices) is only available' and is an app in the os & utilities category. There are three alternatives to ltunify for Mac, Windows, Linux, Chrome OS and Flathub. The best ltunify alternative is Solaar, which is both free and Open Source. Other great apps like ltunify are Logitech Options and Logitech Unifying Software.