This is the program I use to create your trip itinerary. You'll have everything you need all in one place.

Skip the regular passport control line at many US airports. It can be faster than Global Entry at times, and it's free. 

Google Maps allows you to download offline maps, so you'll have them even if you don't have service. Make sure to download the areas you need before you leave.

eSIMs allow you to connect to your mobile data and internet while you're abroad. Use code NEWWON2256 for $5 off your first purchase.

Translate text, signs, menus, or conversations. You can use offline if you download the needed languages ahead of time.

This app is super helpful if you're taking public transportation as it shows real time departures. Mostly used in US and Europe, but they've been expanding worldwide.