I will commission the rewriting of a calculator made in MS Excel into a web application - that is, to make everything work on the side of the website.
The application must have the ability to: user registration, save projects, open and modify.
The operation of calculators for review: https://kosztybudowy.pl/mozliwosci-kalkulatorow/ - please see the video.
Please ask for a quote for a single calculator including login and saving system.
After successful cooperation there will be a need to rewrite more calculators - eventually about 15 pieces.