To download the Credit One Bank mobile app, open the App Store on your iPhone or the Google Play Store on your Android device, search for “Credit One Bank”, and look for the official app published by Credit One Bank. Tap Get (iOS) or Install (Android), wait for the download to complete, then open the app, log in with your online banking credentials—or sign up if you haven’t registered yet—and you’ll be able to view your balance, make payments, and access all your account features from your phone.