Standard Apps are applications that are widely used by organizations, specially SMBs, such as Shopify, WooCommerce, BigCommerce, QuickBooks, Pipedrive, Hubspot, Zoho, etc.
Premium Apps are applications that are popular and highly used by organizations in the mid-market segment. Such applications include SAP Business One, Dynamics NAV, Magento, Shopify Plus, OroCommerce, Salesforce, Dynamics 365 CRM, etc.
Enterprise Apps are complex and heavy applications that are used by some of the largest enterprise brands around the globe. Such apps include SAP S/4 HANA, SAP ECC/All in One, Microsoft Dynamics AX, Dynamics 365 Finance & Operations and Oracle EBS.