I built an app using google sheets and app scripts for my offline business. It allows me to simplify and speed up my workflow. Something that I wanted to do for about 10 years and tried several time and always hit a barrier somewhere that prevented me from achieving it. Thanks to AI, I've managed to build something that works:-). I mainly use gemini for doing it. I also found an open source version or cursor that allows me to jump from one model to the next once the free calls are over :-).