My son has difficulties with waiting so I purchased this app thinking the visual time would be great, it works good, the problem is the least you can set each color block is for 1 min, he is 2 years old so 3 mins is the total wait time that is the least we can do and is very hard to accomplish, would like to see seconds or to not use all 3 color blocks, the price is very expensive for a time that just counts down but I will pay for what my son needs because he has autism but at the same time I feel you kind of are exploiting parents needs for their children and upping the price for such a simple app....