There is a really solid foundation here -- the 'bones' give me confidence this has real potential to turn into a fantastic tool. It's fairly basic, but that's a big part of the appeal (for me, at least) -- there's an elegance in the simplicity.

Just one constructive piece of feedback that I hope the developers might consider, and that's that the single campaign limit (which is totally fair for a free plan!) also restricts users from drafting other campaigns in the sandbox. Aside from this making the tool a little less practical for regular use, that's not the issue... if I want that flexibility to have follow-up campaigns on standby ready for activation, it's fair to expect me to pay for it. HOWEVER, what's been disappointing is that this has precluded me from being able to fully explore all your app's functionality... because in order for me to test out how a different style of campaign looks/functions, I have to delete whatever else I may have created. You're making it more difficult for us to test, learn, and explore; in turn, I suspect this may be impacting your ability to convert people like me into paying customers. Something like one active campaign and three in draft mode would be super helpful for us and just might help you as well. :)

P.S. Thanks for the live demo -- super generous investment of your time for what is a freebie offer. Your genuine care, desire to help, and openness to feedback certainly stands out and is hugely appreciated! :)