This comprehensive guide explores the best stock trading apps available to UK traders, comparing leading platforms including eToro, Hargreaves Lansdown, Interactive Brokers, Plus500, AvaTrade, IG Markets, and SoFi. Each app offers distinct advantages in commission-free trading, diverse asset selection, and regulatory compliance through FCA authorization. The guide analyzes critical selection factors: tradable assets availability, regulatory compliance, user interface quality, account types, and fee structures. For beginners, eToro excels through educational resources and copy trading functionality, while Hargreaves Lansdown provides trusted long-term investing features. The article emphasizes establishing clear investment objectives, understanding risk appetite, and portfolio diversification strategies. All featured platforms operate with institutional-grade security and segregated client accounts, ensuring safe fund protection for UK-based traders launching their investment journey.