Really one of the BETTER and USEFUL apps in the store. – SnoreLab : Record Your Snoring Review

Of the countless apps in the store, this should be in the top 50 or so for its value in use. It takes advantage of iPad’s sensitive microphone and delivers excellent and useful sleep data that when tied in (used in conjunction with) to a sleep tracker, such as a Fitbit with heart rate and sleep stages tracking. While the free version delivers good data, for me the upgrade is worth every penny spent. This is one app I feel is worth the money, ...not true for many other apps in the store, that is for sure. I use SnoreLab and Fitbit Sleep Stages together at night. The SnoreLab app and Fitbit Sleep Stages app keep each other “honest” in that you can compare data from one app to the other, and... one can glean very helpful analysis of sleep times, night time habits, snoring, wake times etc., and this can be helpful when working with doctors regarding sleep related illness and other useful data regarding sleep quality. Try the free version, but consider upgrading as you do get much better data.
Review by Four2x4 on SnoreLab : Record Your Snoring.