Nice app for Montessorians!
I will say that I also believe these Montessorium,LLC apps are overpriced, or should do more. But I am very impressed at how consistent these activities are to the real-life works. They move from concrete to abstract, just as in the classroom. Very easy to use for little fingers (except for dragging to target, see comment below). Love the variety for my rising preK, and review for my K. My suggestions that I am sure you are capable of: need teens works, not just 1-10. Create different levels for patterning. Where are the bead chains? Please add these. The dragging an object tasks are very particular for little fingers.
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Montessorium: Intro to Math