Here are the latest stats on the Comet iPhone app. So far a total of 323 downloads and a 5 star rating.

USA: 166
UK: 25
Australia: 22
France: 17
Canada: 15
Italy: 15
Spain: 9
Germany: 6
Belgium: 5
Ireland: 3
Others: 40

Version 1.1.1 has just been uploaded to Apple. It will resolve the issue of the RA lower limit being greater than the RA Upper Limit. Hopefully that will be approved soon and be ready for update.