Abstract: In recent years, the financial services sector has undergone significant transformation due to rapid technological advancement and the growing adoption of digital investment platforms. Investment applications have become widely popular among retail investors as they provide easy market access, real-time data, and simplified trading mechanisms. However, the integration of behavioural finance tools within these platforms has also influenced how investors make financial decisions. These tools are designed based on psychological insights and aim to guide investor behaviour through features such as alerts, notifications, robo-advisory services, gamification, and behavioural nudges.

This study examines the rise of behavioural finance tools in investment applications and their impact on investor decision-making patterns. The research highlights how these tools can both support and influence investor behaviour by improving financial awareness while also potentially encouraging emotional and impulsive trading. The study further evaluates how design elements within digital platforms may trigger behavioural biases such as overconfidence, herd behaviour, and excessive trading among retail investors.

By analysing the role of behavioural finance mechanisms in modern investment platforms, the study provides insights into how technology is reshaping investor behaviour in the digital era. The findings emphasize the importance of responsible platform design, investor education, and regulatory awareness to ensure that behavioural finance tools enhance rational investment decision-making rather than amplifying psychological biases.

Keywords: Behavioural Finance, Investment Apps, Investor Behaviour, Digital Trading Platforms, Behavioural Biases, FinTech.

Downloads: | DOI: 10.17148/IARJSET.2026.13339