The app is user friendly, featuring simple language, colorful visuals, and the ability to tailor the settings from easy to medium based on the child’s progress. All of the previous factors are the pros, but there are a few drawbacks. There are two versions, a free one and the other that costs $4.99. The free one, while still great, does not feature the superb visuals seen in the $4.99 one. Also, the free version is not free from third party advertisement. All in all, the app is worth either the download or the money.