Should I learn to make Android apps or Iphone apps?

At first I wanted to learn to make Iphone apps, but I will have to go and buy me a mac, So I figured should I make Android apps since I already have a windows computer? And I'm learning java I know I could learn it on mac but I know my way around windows better. My question is what is better to learn to make Iphone apps or Android and why, witch makes the most money.

ANDRIOD
you already know how to do it and there are more andriod users than iphone

Android. There are so many Android users than on iPhone.

IPHONE
Um, you don't necessarily need Mac to program iphone apps.

I'm suggest that you go to youyube and download a video about your subject. Then learn it.

IPHONE

You need to buy MAC anyway and have to paid the developer licences fee too;
More people with ANDROID devices, but ANDROID users are not willing to buy games, apps comparing with IPHONE users.
If MONEY is the most reasons you learn, IPHONE is your only option;