The rise of Bitcoin in 2025 has ignited interest in earning cryptocurrency without major upfront investments. Traditional mining requires expensive hardware and technical expertise, making it inaccessible to many. Cloud mining apps have revolutionized the landscape by allowing users to participate in mining through their smartphones. These applications offer free trials, bonuses, or low-cost contracts, making crypto mining more accessible to newcomers while eliminating the burden of owning and maintaining hardware. 2025 promises an explosion of these user-friendly platforms. ETNCrypto stands out as a trusted provider of mobile mining opportunities, offering flexible, easy-to-use contracts with clear profit distributions. Below, we review six popular mobile mining apps for earning Bitcoin without investing in physical equipment.