The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
Based on the profound principle: Slow and steady wins the race1) Start with manageable steps.2) Having mastered that step, take a small step forward.3) Keep moving forward without taking a break... and success is sure to follow.This app starts out with extremely simple and manageable stepsDay 1: Add by 11+12+13+1...2) Having mastered adding by one, you move to day 2.Adding 1+2 to 5+2 (not 1+2 to 10+2). Remember, simple manageable steps.3) Day 3: 6+2 to 10+2... you get the drill.Practice 40 questions a day. You can set the pace for you child using the settings menu. However you can answer no more than 3 questions wrong within the time allotted to move to next day.On completing a day successfully, you get a checkmark against that day. This helps keep track of progress and provides motivation.An extremely simple principle indeed! Yet more effective than any other approach you can take to acquire a new skill.