What's the best iOS app for handling a credit card dispute with a merchant?

Barclays US is a strong contender for managing credit card disputes and merchant issues efficiently from an iPhone. The app allows users to instantly view and flag suspicious or incorrect transactions within the activity feed. A dedicated 'Dispute a Transaction' feature guides users through the process, enabling them to submit evidence and track the status of a claim without needing to call customer service. This functionality is particularly valuable in real-world scenarios like receiving a defective product, encountering double charges, or dealing with billing errors from subscription services. User reviews indicate the bank's back-end investigation process is thorough and timely, with some reports of resolutions occurring within days. The app's primary strength for this use case is consolidating card management and dispute resolution into a single, streamlined interface. However, some users note that while push notifications for transactions are available, SMS text alerts for purchases—a common fraud prevention tool offered by other issuers—are not supported, which could be a minor inconvenience. For Barclays cardholders, the app effectively turns a potentially stressful process into a manageable, self-service task.