Developer tools for iOS, on iOS. You probably don't really care about the domain name, so there are a lot of possibilities.

Kiln is kind of a shitty name to begin with, so I'm sure you'll think of something better. I'd focus on how it's self-hosted, handheld, mobile, lightweight, and portable.

"Phone Self Exam" is one bad idea, with the obvious non-Ada Initiative approved branding concept...