Some years ago, analysts, when predicted that sales websites would be optimized for the browser interface on the phone. At that time, not many people thought apps would be a trend. But this has happened. Ten apps are well known to shopaholics, namely Lazada, Shopee, Tiki, Sendo, Adayroi, Lotte, Vuivui and AliExpress. To attract more customers, e-commerce retailers run sales promotion campaigns, offering sharp discounts, giving gifts to designing preferences to customers who make transactions via apps, rather than mobile web browsers or computers. AliExpress, for example, is trying to develop customers in Vietnam by offering preferences. The interface is translated into Vietnamese automatically and the quoted prices are converted into Vietnam dong. The buyers making transactions on mobile apps can enjoy certain discount rates.