To get familiar with the app, check out the How to Use the App video in the sidebar and the How to Use the App guide in the Resources section, located in the footer.

While logging your workout, tap the History Button ↺ (second icon in the footer), a pop-up screen will appear with your logging history for the exercise, tap Close in the upper left corner to return to logging.

You can change from pounds to kilograms by tapping Settings in the lower right of the footer, toggling the slider on for Metric, and tapping Save in the upper right corner.