Hello Sr,
It would be an absolute pleasure if I could assist you with your project, which I must say seems to be a nice one.
I do have a few questions of my own related to you bid:
1 - Will you be providing the design for this app?
2 - After reading the app outline, it looks to me you will be needing an administrative interface for events, speakers, etc. Is that the case? Please do let me know, but I can't put together such interface for you (price included in this bid)
3 - What sort of mapping capabilities do you expect from your application.
I would like you to know as well that I will be building the application using either MoSync or PhoneGap, which are both cross platforms development tools, that allows us to target both intended audiences using the same code base, which greatly reduces the prices and development time.
Bests,
Yoanis.