Update: with the latest updates, the app is no longer completely free for all features, but instead locks many of them behind a "premium" paywall. The price is reasonable, however. It also seems that the open-source version hasn't been updated in a couple weeks, hopefully the developer hasn't abandoned that. At least updates are very frequent recently, even if not free features.Original review: A simple yet effective app, does exactly what is described, and completely free other than optional donations! Great for experimenting with the LiDAR sensor!