POS software on Linux?

Hi,

I forgot to tell you how grateful I am for accepting me in this forum, so I would like to say thank you very much to all of you.
You see, this is not my first time to post here. Last time, I informed you about our Android app that can be downloaded on Google Play Store. That POS software was created for restaurants and other retail businesses.
We have decided to make it run on Linux since the OS can handle POS systems well and it is also a free-source just like Android.
I am asking for any suggestions you could give us to make this possible.

Again, thank you so much for this opportunity!
God Bless and more power to this site.