Hi, I'm Francesca @AppMinded. Thanks for your supporting post.
As you said the app is still a working in progress but we are constantly trying hard to improve its performance and to add new features.
In the next update, version 1.4, the map should be more stable, faster to load and you will be able to create a bigger grid. Moreover we are going to cap the number of ads for a less disruptive experience.
We are thinking to create a desktop version too. Do you think can be a great complementary tool?