Hair Salon pos and appointment issues

[Cefox]

1.  It would be nice if the tip was calculated on services not items or retail.  Whenever my clients have to use the manual option they always screw it up.

2.  Most important.  I've used square for years and love it although theres a couple draw backs for salons.  I'm ready to start using the online booking option but we all double book.  If we cant book in the processing time its gonna be an issue!!  I'm gonna try it out and see if i can use it and maybe adjust them myself but if it gets annoying Im just gonna switch to a salon software that can double book.   Looks like its been years since ppl have been asking for this so if it's not in the pipeline not sure this will continue to be a good fit for us unfortunately.