Frequent travel doesn’t give you many opportunities to stay in shape. Other than sprinting to catch a plane or train before it leaves, you might spend most of your time sitting and eating high-fat foods. If you travel a lot, whether for work or pleasure, you need the best fitness apps for busy travelers to help you stay healthy. HealthyOut Image via Google Play Operating system: Android and iOS Price: Free Finding healthy food on the road is always a challenge. Whether you’re driving on the interstate or spending a few days in an unfamiliar city, it’s hard to know which restaurants…