1. Maps.me
    You can download maps that can be accessed offline. Plus, even if your phone is deactivated, it can pinpoint exactly where you are.
  2. Airbnb
    If you are traveling with other people, sometimes it is better to rent a private room and share the cost. I liked airbnb because it was cheaper and the hosts allowed me to use their kitchen.
  3. Whatsapp
    You will need this for sure in Latin America as most people only text through this app.
  4. Google Hangouts
    You can text message, video call, or make phone calls using wifi.
  5. Convert units free
    Convert weight, money, distance, etc.