This app basically works as advertised and it works well. I use it daily in my weekend job, eliminating the need for carying around a pen and small note pad. Since I work out doors, thats important. Not a lot of ink pens work well at -10 degrees nor on wet paper when it is snowing. I did not see anything missing from what was presented on the App store. The free version was sufficient to evaluate the usefulness of the app. As a result I purchase the full version. There are a number of complaints about the app. I could not reproduce any of them and write off those cited in other reviews to "operator error." I gave it four out of five stars mainly due to an ugly user interface. If they fix that it is easily 5 out of 5. I give this app a "buy" recommendation is you need the feature it provides on the iPhone.