This is a curated list of "best in breed" math apps for math. Great for reinforcement or differentiation. Many apps are Assistive Technology for students with memory deficits, visual deficits, dysgraphia, fine-motor skill deficits, and dyscalculia, a numeracy disorder. A few apps are for teachers to use to prep custom lessons. Perfect for 504 plans and IEPs which require consideration of available technology.
This list covers math-related apps for grades K-12.
Paid version has full descriptions and is 10 pages long.