How to optimize your caffeine intake with an app

I developed a similar app for Android about a year ago. Check it out...<p><a href="http://www.rogansoftware.com/caffeinetracker/" rel="nofollow">http://www.rogansoftware.com/caffeinetracker/</a><p><a href="https://market.android.com/details?id=com.cafapppro" rel="nofollow">https://market.android.com/details?id=com.cafapppro</a>

Is there any reason apps like this have to be tied to a specific platform? Seems like this would be easily done in Javascript and distributed widely. I especially don't get the craze of putting simple things in iOS apps but not in web apps.

I want this for beer.