Mobile apps influence experience in a good way if they are well planned/designed. If they are poorly designed users will get irritated and definitely not use your services/content. Apps are usually safer, more organized and practical, especially if you are talking ecommerce. Having a tool to make your purchases easier is a must, whether you are the buyer or the seller. If you intend to have a company selling online make sure you have a reliable app for that. Also, many people avoid downloading apps for every single thing , unless the app can be really useful you might as well Just have a very good and reliable and responsive mobile page. Ideally have both app and page in good shape.