This is a tricky app building tool but it is better than it is getting credit for. It is not perfect but in my opinion it is better than most of the app tools I have seen come to this platform. The bad part is most everything is still in Spanish but I give them credit because they are converting it fast. They have an entire youtube channel with tons of videos in Spanish but they are slowing converting them over to their English channel. I did a little quick walk through of the basic features here.

https://youtu.be/rjF1ah7lKY0

I finally can build some of the more difficult apps I have been wanting to build using Google API's.

Pros:
+ Upside (so much)
+ Can build an app in short order
+ Tech support is better than expected
+ Have an App Market place (but mostly in Spanish)
+ Have an open API

Cons:
- Help information is still mostly built in Spanish (but converting fast)
- Mid to High learning curve (unlike any other builder I have seen is the reason)
- Only available in Spanish and English