Thank you Skysurfer for your answer.
Actually I corrected the reticule with partial Octans view in terms of orientation and I also added the letter T (Tau Octans) on one of the star as it is on skywatcher polaris scope.
Concerning the scale, both reticles come from what you can see on skywatcher polar scope.
In fact the purpose of this application is mainly to provide information needed during Synscan initialization. The alignement reticles are just shown here to illustrate the polar angle or octans orientation.
see attached image.
Octans stars used for south alignment. cassiopea and big dipper for north alignment.
So my concern is to have feedback from a southern tester to see if this app is useful for you.
thanks again for your help.