...
You have to do ONE MORE STEP than says on this document - go to Connected App OAuth Usage and unblock SalesforceIQ there. Now to test it out.
Using the Mobil App
Look, using apps like this just don't work for me. The Cirrus Insight Mobile app is good, but it's the same thing - I use Gmail for a very good reason, it is a fantastic email client and it is available on all my devices and it looks and functions exactly the same on all devices. And it has categorised inbox. You just can NOT beat Gmail as a mobile email client. So why would I use an inferior product?
If you don't use Gmail, you are out of luck.
...