What are Carolyn Scott's must-have travel apps and services?

Carolyn Scott-Hamilton recommends several apps for solo travelers. These include Backpackr, which connects travelers with others in their area, EatWith for immersive culinary experiences, Travello, a social network for travelers, Couchsurfing for finding accommodation, SoloTraveller for meeting like-minded adventurers, and Chirpey, an online community for female travelers. For hiking and backpacking, she suggests MapFactor and OsmAnd for Android users, and Waze and Apple Maps for iOS users. She also mentions the Better Me workout app.