The Errors and Logs tabs in the App Dashboard are very similar to the more general Errors and Logs dashboards but are filtered to a specific app.
The Errors Tab will present a list of all errors for the App. By clicking on the number of errors on the right side, you will be brought to the Errors Details page where you can see more details on a specific error.
You can capture all your App logging messages with Retrace's Logging Aggregation feature. Based on how you configured logging for your App, you will be able to see logs in the App Dashboard.