To help users save even more money on their purchases, a lot of cashback apps also offer users access to special discounts and deals. Cashback and shopping apps are an excellent method forummy.olar users to stretch their budget and make their money go farther, as they have the potential to generate substantial savings over time. With more people attempting to increase their wealth through investing, investment and stock trading apps have grown in popularity. Direct stock, ETF, & other securities trading and buying from a smartphone is made possible by these apps.