The development of this Android app is supported by in-app advertisements powered by Google AdMob. If you are generally not comfortable with ads, you can purchase the "ad-free" addon in the app (as of version 2.0).
In AlarmDroid, go to Menu > About, and hit the "Purchase ad-free add-on" button.
For support, please see the question and answers in the AlarmDroid Google forum. If your question is not yet answered, please post your question at that place, it may be of interest also to other users.
If you prefer direct email contact, for example for purchase-related issues, contact firstname.lastname@example.org or click the button below.