Nowadays, in the digital age, there are a lot of smartphone apps that can make you money. These applications serve a range of people who are looking for work, from those who want to supplement their income to those who want to replace it. The new casino slotsarray of applications that are currently accessible falls into several categories: platforms for conducting surveys and market research; cashback & rewards schemes; gig economy services; tools for investing & stock trading; and marketplaces for reselling or selling goods. The top revenue-generating apps in each category will be looked at in this article, along with tips for maximizing income potential on these digital channels. The Best Apps for Market Research and Survey Revenue.