The last weeks were diligently tested and improved with a small test group. Now it is finally online: The new Google Sheets Plugin.
If the reports in TimeOwl are not enough, you can use the TimeOwl() function to create your own reports including charts and calculations. The great thing about it: The Google Sheets update themselves completely automatically.
You can find more information here.
If you prefer to create static reportings, you can do that as well. Here, too, you can now create your own templates.
You can learn how to do this in the appropriate Academy.
You want to download and install the plugin right away? Then just go to the Addon-Store entry.