Upcharge Fees & Product Addons

I need an App to add extra handling fees at checkout, this was perfect app for me and it does not require me to subscribe to shopify high price plan or a yearly plan and I really appreciate their customer support " Javid "
Later I needed to modify my product page to remove express checkout, they have an easy chat button i used and the AI was trying to help me but it was difficult for me to understand how to do this tech things, immediately Javid noticed that I was struggling with AI, so he jumped into the chat and within 2 min the problem was solved, I don't give 5 stars to any app, but honestly he earned it.