I've never had problems with Coradine and LogTen. Support has always been very responsive via email, they even helped me integrate an old excel logbook into my logten logbook. The iOS version has always worked pretty well for me.

My only issue with them is that they require a Mac for the schedule importer. My MBP died a few years back so I haven't been able to upload my sabre crew cards. I emailed Coradine back in 2012 and asked if they were adding a schedule importer for iOS and they said it was definitely a priority for features to add. Guess not.