I downloaded your app, VERY nice and really professional! I like how the shortcut icon is clouds and a spinning top totem from Inception The clouds remind me of Vanilla Sky.
I downloaded it last night and used the reality check reminder all day today, it works great! It also gave me an idea that you might not have thought of... Im gonna use the reality check feature every day especially in the evenings at work. ( I work 5 pm to 1 am) I listen to music at work with headphones using my phone, the reality check reminder just interrupts the music for a second and isnt a bother at all. I have a very short, (1 sec long) soft ring tone set for the reminder, but check this out.... When I go to sleep every night around 2 am, Im gonna set the reality check reminder to go off every half hour while I sleep. I have a speaker on each side of my head when I sleep and I use my phone to listen to music for a while as Im falling asleep... the playlist stops but the speakers stay on all night.
Im hoping with the reality check notification going off through my speakers while I sleep, I will hear it in my dream and be reminded to do a reality check. Like I said, the ringtone I use is very non-intrusive so know it wont wake me up.
What do you think? Its worth a shot. Great app all around though, Im gonna buy the premium.

p.s. Im new to the forum but not really to lucid dreaming, Ive had probably 15 LDs naturally since I was 10. I had 4 IN A ROW in the same night a couple weeks ago, which finally made me want to get serious about it. Ill post an introduction as soon as I get around to it