This is a great pacing tool and quick reference step-by-step guide which is very practical for a real-life situation. The audible and visual pacing is loud and easy to follow, but one suggestion about the added voice countdown. This kicks in when its close to completing a 30 compression set and counts them down as 3, 2 , 1.......breathe. In class we are taught to count them in ascending order outloud or in our head to keep pace and accurate count. To hear only the end count and in descending order can throw us off. I suggest they be counted as 27, 28, 29, 30.....breathe. Also....we were taught to pause after 5 complete sets to check pulse and breathing. And to continue if none. Should the timer pause for that? The step-by-steps are pretty good but could be even more concise and to-the-point. In an emergency situation, it would be easier to have key words and sentences. Links to additional information could be added at page bottom for more comprehensive information or in a different section entirely for brushing up when there is time to do so. Steps are provided for adults and infants. They should also be added for children. Compressions slightly differ in the use of one hand. It would help to be reminded. Also, can the steps be chosen from a set of tabs instead of the "i" button? Its not as responsive or noticeable, especially if we were in a hurry. If you add certification date and an emergency call button within the application this would be a 5+ star package. Love the icon!