Along with the development of technology, many Micro, Small and Medium Enterprises (MSMEs) from various circles have started to make websites or mobile apps a necessity in the business they run. Apart from being used as a platform for buying and selling transactions, websites or mobile apps can be used as a means of marketing, financial records, goods allocation, and other system needs to make it easier for them to do business. T-Phone Semarang is one of the MSMEs engaged in computers and accessories, located at Jalan Karonsih Utara Raya 243, Semarang. This shop sells cellphones, tablets, laptops, and accessories. To overcome these problems, we need a system that makes it easier for the store to record and check goods and finances. Therefore, the information system based on website and mobile apps that we created is expected to be an efficient and effective information system for use by the T-Phone Semarang store.