As this isn't an official app, I'm hesitant in logging into it :(
It does not require you to login at all. Currently it only displays exchange data with live updates.
It is also not open source...
The fact it isn't open source testifies against its security?
There's no guarantee that the code on GitHub would be the same at App Store. However I feel pretty secure since these apps are carefully reviewed by Apple.
> However I feel pretty secure since these apps are carefully reviewed by Apple.
Ha ha :).
I'm planning to open source it once I implement a feature that requires an API key that can execute trades.