Hi @mostafa90, as you have no doubt realised the software supplied with the Tobii 4C Tracker is intended for use alongside the traditional keyboard and mouse setup, most especially in gaming.
Software tailored for exclusively accessibility purposes is available and produced by Tobii Dynavox who are responsible for products such as the PEEye Mini and Eye Mobile.
In order to purchase their accessibility software, you will need to speak to Tobii Dynavox sales directly @
https://www.tobiidynavox.com/about/contact/ who should be able to offer you a quote in accordance with your needs.