# Add-on Features

Premium tools available on Gold (paid add-on) and Platinum (included) scan tiers.

- [How to use Lot Viewer for per-lot grading analysis Automatically calculate per-lot Cut/Fill, spot elevations, and compare against plans — included with Platinum, add-on for Gold.](https://manual.traceair.net/en/articles/14351658-how-to-use-lot-viewer-for-per-lot-grading-analysis)
- [How to find where stormwater will pool on your site Use the Closed Depressions Report to see the low areas where stormwater will collect after rain — across the whole site, color-coded by depth.](https://manual.traceair.net/en/articles/15901525-how-to-find-where-stormwater-will-pool-on-your-site)