We used this app to track our acceleration of jumping, lunging, and running. With this app it was able to tell us the differences in our acceleration, and also did it in 3 different directions (even though we only used the x direction).Although it did accomplish what we needed it for, it did not keep track of the whole graph once you started the activity. The screen would keep moving and where ever you stopped your graph, which was at the end of your simulation, it made it hard for us to depict an accurate simulation/graph. Also another concern we had with the app was that we couldn’t physically see our Domain and Range. Domain due to the constant moving graph and Range due to if the acceleration went higher than our phones on the graph, we couldn’t see it, it didn’t expand. Another thing we questioned about the app was that it didn’t have graph lines to indicate the measurement of when it crossed the x-axis or just when the graph lines moved period. But back to some good things, it did show the acceleration, as for slowing down and speeding up pretty accurately. Whenever we would go faster the graph went up and whenever we slowed down the graph lines declined, and also since we jumped and lunged pour graphs should have contained some lines under the x-axis and it did. We would recommend this app to our friends or anyone who would need this app, without a problem.