I went into this very optimistically but there were just too many flags that indicate this product isn't ready for prime time yet, in my opinion.
Firstly, if you or your users use Safari (25% of web users use Safari) this platform isn't regularly tested against it so buyer beware if that's your target audience. Trying to establish an account I faced some crazy issues and I found that the login and sign up process is incompatible with Apple Keychain / Safari Autofill. The login fields are not correctly labeled nor filled in automatically. Every time I login to the service I must manually enter my email as only the password correctly autofills. I don't understand how any one at this company could miss this - surely at least on of them uses a Mac or Safari in order to test out the iOS/macOS functionality?
Then there is the extremely concerning "You agree we're allowed to monitor your usage" notification upon signing in to the designer. I'm sorry, can you be any more vague? Do you mean resource statistics like storage usage or are you freely accessing our clients information and data whenever you want? Where is the opt-out for this? Really unacceptable.
Lastly, and this is just a personal preference (coming from tools like Bubble/Figma/Whimsical etc) but in Safari you cannot click to drag the canvas with the mouse.
You must use your mouse scroll wheel to go up and down or shift+scroll wheel to go left and right. This is so strange and obtuse to me given the story board should be something you can move around in easily.
Common shortcuts don't work either, for example, a lot of tools like Figma let you click and drag by holding a modifier key like Space Bar or Shift and they simply don't exist here.
With those features missing, it would have made sense to include zoom and pan controls to the canvas area, but once again, in Safari at least. Nothing.
I'm going to assume it is a "me" problem, but unfortunately as someone invested in the Apple eco-system and market, these shortcomings make it a deal breaker. Conceptually, I love so many things about what these guys are trying to do.. so I guess if you're an Android developer, you live in Windows and you use Chrome, this could be a really good deal for you.