When it comes to app stores, every big platform now has one. However, individual developers tend to have a hard time “comparing”, as the usually tend to focus on one or two stores and thus end up with “slanted” numbers.
Market research house ABI Research now provides the following chart:

Unfortunately, the company also predicts falling revenues to to the increasing availability of free or ad-funded substitutes for must-have apps.
Do you folks agree?
Related posts:

I think it depends on what your purpose of writing an app is. I write apps for me; I’m not trying to make a living so I will set a price and if people pay, great, if they don’t – that’s fine too — I don’t really care if people use my app or not. The price will be based mostly on what I think the value is; as opposed to what the market will bear.
My Palm app is free. Being free liberated me from support. Now that I’m moving to Android I will probably make available both free (w/ads) and pay versions (with premium features).
BTW: When you write apps for yourself, platform support is defined as “what Max has in his pocket.” I ditched the Centro for a Nexus One; so that now means that the Palm will no longer be updated and I’ll start looking towards Android.
I think Android will overtake iOS because it is fundamentally a more open system and open environments eventually overtake ones that are locked down. Apple simply refuses to let go, and I think it will eventually be overcome.
Funny to think of the company that billed itself as iconoclastic in the 1984-like commercial (versus the evil empire of IBM) now becoming the “evil empire” itself.
Hi Folks,
thank you so much for breaking this up!
@Max: did you ever think about going ad funded?
@Harold: the thing is this: for most of the users who own an iPhone, the limitations imposed by Apple are not felt as limitations! So I am not sure whether they will feel so motivated to go Android…
All the best
Tam