"For free" can be replaced by several synonyms such as "at no cost", "chargeless", "complimentary", "costless", "gratis", "without charge", "for nothing", or "free of charge". The term is widely used in marketing to promote products or services with no monetary obligation for the customer. Similarly, digital products like apps, games, and music often advertise as being available for free. However, some people argue that the term "free" can be confusing as nothing is truly free; there is always a cost involved, whether it's the cost of producing the product or the cost of consuming it in terms of time or personal data.