Surely you should check the vuejs and reactjs documentation for minimum sepcs/versions required and then also check that against the current market usage of android, ios, blackberry and microsoft. Always check documentation before asking about any uncertainties.
TheSheriff
Co-Founder, Founder, Entrepreneur & Problem Solver
There seems to be no ask for further details, so I have to write it here:
What do you mean by 'low end mobile phones'? Is there a specific target minimum version you have in mind? Or is it a case of 'how low will it go'?