One thing I'm always curious about when I see revenue from mobile applications is: does advertising on a mobile device really work? I'm hesitant to sell anything unless I'd be confident selling it with my name attached to the label and I'm not sure mobile ads are something I'd consider valuable.

The two primary issues are that 1) mobile devices slow down / severely discourage any online form entry and 2) the age old question of "how many clicks are misclicks".

1) is the killer for me. It's rare for me to actively click on an ad and even if I'm drawn to an ad whether I'm on laptop/desktop or a mobile device makes quite a large difference on the ultimate decision.

I guess you could argue that it's up to the advertiser to ensure their ad money is well spent but unless you're just spreading awareness (or possibly other applications?) I'd personally not feel happy selling mobile ads.

Thanks for sharing your numbers though! This sort of openness is something I quite enjoy seeing. Best of luck hitting your $2k goal next month and I hope the $4k goal is reached soon after :)