These apps are a great start. I tried coinflash for 40 minutes. It was very impressive. Then I did the math. The fee's make it so you lose like 40% of your contributions. Also the pricing of coinbase is always higher than any exchange.
If someone builds an app OR coinflash or dust stop using coinbase and use an api based exchange, then I will sign back up.
You should check out Crumbs, there are no fees!
https://itunes.apple.com/us/app/crumbs-app/id1294821136?mt=8