Look for clear spending categories, useful alerts, realistic budget tools and easy data export, and check whether the app connects to your bank through open banking. Before signing up, read its privacy policy, check fees and confirm whether the provider is authorised or registered with the FCA where relevant. Use a strong, unique password and never share your online banking login directly with an app. A budgeting app can highlight patterns, but check important figures against your bank statements and do not treat its suggestions as regulated financial advice.