Most Cloud based POS have an offline mode, which still allows you to process transactions. Vend (vendhq.com) stores a local copy of the information needed to pr

Most Cloud based POS have an offline mode, which still allows you to process transactions. Vend (vendhq.com) stores a local copy of the information needed to process sales (products, taxes, payment types) and allows you to continue processing sales, although it restricts you to selling and you can't manage inventory etc