Yes. Based on the same area as previous. 2x horizontal and 2x vertical is 4 pixels occupying the spot that was previously occupied by 1.
What resolution were the other phones at the time?
Nobody cared. Most just figured all LCDs would have obvious visible pixels until iPhone 4 set them off.
4x the pixels of previous iPhones. Significantly higher pixel density than any flagship smartphone or tablet. It set off the competition to start making displays with higher and higher DPI, well past the point where it had any benefit and actually started to be detrimental. Cramming more pixels into a fixed area means more of that surface area is wasted by the tiny gaps between the pixels (which block the backlight). Engineers compensate with a brighter backlight to get more light from the pixels within the area. That already means you have greater battery drain. Then, actually rendering the (mostly imperceptible) details requires more processing power and battery drain.
I think most android were in the 800*400 range, which is not a quarter of 960*640
They also had larger displays. Pretty much all smartphones and tablets were comparable DPI to the original iPhone, even the ones with bigger screens and higher resolutions.
Haven’t clicked it yet. The big one I remember: Evo 4G. One of the early “phablet” class phones. Also one of the only phones other than iPhone 4 to have a front-facing camera at that time. Unfortunately, it became completely worthless long before iPhone 4 did. The price of Evo 4G was also much higher. Sprint doesn’t even have the “4G” WiMAX network any more since they came to their senses and re-farmed the Spectrum for proper 4G LTE.
Apple increased the screen size in one dimension with iPhone 5, but didn’t change DPI at all. Then the iPhone 6 and 6 Plus set Apple’s current size/DPI standards. Quite justifiably, the resolution of iPhone 6 was chosen specifically to facilitate compatibility and consistency with existing apps.
“Plus” size iPhones actually have 1920x1080 mostly for 16:9 1080p movies. To avoid layout issues and maximize app compatibility, apps run as if they are at a slightly lower resolution and some UI elements are transparently re-scaled to the native 1080p display resolution.
I like this rationale. I remember how miserable it was to use mainstream Android apps that would have ridiculous layout glitches on my 1024x768 10” 4:3 HP TouchPad. Developers just didn’t seem to realize Android would ever run on a 4:3 tablet (even though others did exist).