Delay

I don't plan on live blogging this trip but I am trying to figure out the limits of not having your cellular data on.   Am I able to use certain apps eg this one?  

I am at msp terminal 2  chillin.   My flight was delayed and I am headed to Iceland a few hours behind schedule.  Interestingly enough - because I purchased my ticket the way I did, the flight should be adjusted without fees AND  I got free breakfast plus a $100 voucher for future travel.