It doesn't work on 3GS, I emailed Steve jobs and he responded like this:
Nope, sorry.
Sent from my iPad
On Jun 7, 2010, at 2:23 PM, Simon <***@***.org> wrote:
Dear Mr Jobs,
Whilst i appreciate that you must be very busy right now, I was wondering if you could answer my question. Will the new iMovies app work on the iPhone 3GS?
Thanks
Simon
Looking at the Apple web site's page specifically for iMovie for the iPhone, it states "designed for iPhone 4" which seems to indicate it is indeed going to be available only for the new hotness.
As a 3GS owner, I would love iMovie as an app, but I'm sure that it requires some serious horsepower and I'm sure the A4 processor will play a big part in making it run smoothly. But that's just my 2 cents.
As a developer I can confirm I don't think is marketing, but it's probably a RAM issue. Handling video requires a lot of RAM and the 3GS has half the RAM of the iPhone 4.
I'm starting to work on getting it to run. I can get iPad apps to run on my iPhone 3G, so getting iMovie to work shouldn't be a problem. Although iFile isn't working for me, so I have to wait for the developer to post an update on Cydia.
As a developer I can confirm I don't think is marketing, but it's probably a RAM issue. Handling video requires a lot of RAM and the 3GS has half the RAM of the iPhone 4.