I used WeWeb to build my SaaS app / website and it was a great experience. Here’s the link: https://www.galaxyrm.com/
I built a CRM (from scratch) designed to help small investment teams manage deal flow (i.e., search funds, family offices, venture funds, etc.). Unlike sales and marketing CRM’s, it’s designed to organize key financial data and diligence information for target companies and to track sourcing/deal pipelines.
I’m not a developer and had never built an app before. Overall, it took me about 5 months from start to launch the first version. I used Xano for the back-end. I also integrated Stripe subscription payment, user documentation and a blog…all using WeWeb (although the blog formatting still needs work). It was originally intended for desktop browser use but I am almost finished formatting it for tablet and mobile as well.
I have a few ‘early adopter’ firms using it to help me work out the bugs and it’s going well. It’s paywalled but if someone wants to check it out I’d be happy to setup an account for you for free. Any feedback you may have is welcome 
Galaxy is still very much a work in progress (especially the UI/UX design) but building with WeWeb has been awesome. I’ve learned a ton and would recommended it to others.