• 2009: DEF CON 17, Original standalone concept: David Schuetz (@DarthNull), and (independently created) standalone DEF CON app: @dtjedi.
• 2010: ShmooCon VI: First integrated KhanFu database and mobile schedule. 2010: Dedicated DEF CON 18 iPhone app, by @dtjedi
• 2012-present: Continued support and minor improvements (plus over 70 conferences!): @DarthNull

Special thanks to conference organizers for their help and support (in cases where David hasn't simply scraped website schedules on his own....)