Most public transportation companies have mobile
apps for their schedules etc.
National Weather Service
Also follow/read their twitter feeds for each city.
Arizona Department of Transportation’s Twitter feed
Red Cross Mobile Apps
Most health care companies have apps or mobile sites to look up urgent care
facilities etc. that are in your plan.
Federal Government’s travel warnings
Center for Disease Control’s travel advice
U.S. Embassy Page
XE Currency Converter
Most hotels, airlines, buses, trains, etc. have apps that you can get from the app store of your device.
How to track your flights online
Look online for tourist department for the city or state you are going to.
Watch out for indoor spy cameras when renting a house or apartment