Honestly, it doesn’t matter what tools you use. The real value lies in the final product and the satisfaction of your client. If you've met or exceeded the expectations and delivered a high-quality outcome, then the tools you used to get there are secondary. What matters most is the skill and creativity you bring to the table, not whether the tools were free or paid.
In many cases, free tools can be just as effective as paid ones, especially when used by a skilled designer. The ability to produce stunning visuals and a seamless user experience doesn’t depend on the cost of your software but on your expertise and how you apply it. Clients typically care about the end result - the functionality, aesthetics, and effectiveness of the design - rather than the specifics of the tools used to create it.
Moreover, from a business perspective, I couldn't care less how it's made, as long as it's made as I want it. It’s smart to utilize resources that allow you to maximize efficiency without compromising on quality. If a free tool enables you to deliver a product that meets your client’s needs, then it's a win-win situation in my opinion. The cost of tools is a factor in the production process, but it doesn't diminish the value of your work or justify lowering your fees.