I love this app builder! The author is responsive, too.

(From experience, my clients will call me out on these issues: Even though the localization settings are in English using USD currency, it's not quite ready for me to build an app for a US English speaking client. They need to include AM/PM in addition to 24 Hour time, and some of the language conventions need to be able to be changed by us, the users, to be more familiar to our audience. These are the details that polish the end product.)

Having said that, this is only version 1.0.0 and it has whopping potential. The author has packed so much into the software in terms of features and designs. Looking forward to the evolution of this product.