Your admin area has a variety of features, including the ability to download reports. Simply head to the customers or reports tab, filter the result (if you want) and click the download button.
For transactions, simply head to the transactions tab and click "export data".
The reports are being downloaded directly to your device. You can then filter and sort the report using Excel, Google Sheets or Numbers for example.
If you require additional or special reports, let us know by using the chat bubble :-)