Beware! Jobs disappear when you get to location!

I have been trying to use this app for over a month now and the only "job" I have been able to complete was an at-home survey. I have driven to at least 5 locations after pulling up the information & refreshing the app, and WITHOUT FAIL, the jobs suddenly disappear when I pull into the parking lot. Dont waste your time and gas $$. Wondering if this is a scam app.

washuuusama11 about Field Agent, v2.10.003