I was excited to finally see a tens frame app, however, was dissapointed after buying it. It seems to only allow 5 counters of one colour, and 5 of another, which makes showing 8+2=10 difficuilt (youd have five blue, 3 orange, and have to add 2 more orange. Better to have 9 or 10 of each so that its easier to show combinations of numbers over 5. Just do that, Matthew Thomas and Ill give you 3 stars!