Using survey and opinion apps is one of the simplest ways to earn money without having to invest any money. In exchange for money or prizes, users of thespassport available slotse apps can offer their ideas and opinions on a range of goods and services. Users can make money by answering surveys on a variety of topics with Survey Junkie, for instance. Comparably, Opinion Outpost offers users the opportunity to get paid for participating in online surveys and sharing their opinions.