See update below.

Apple’s iPhone 5s is set to launch with impressive improvements in the camera department. However, one such feature thought to be reserved for the upcoming handset – a “burst mode” for the Camera app – is available to access now in the prerelease iOS 7 Gold Master (GM), and is reportedly compatible with the iPhone 5, iPhone 4s, and more.

The news comes from iDownloadBlog, who explains that the feature can be accessed in the iOS 7 GM Camera app by holding a finger down on the shutter icon. Doing so will result in one’s iDevice taking “continuous, rapid shots,” the website explains.

Though Apple unveiled the feature alongside its iPhone 5s, which also sports an exciting slow motion mode of video recording, an f/2.2 aperture, and a larger active sensor area that supports 1.5 micron pixels, the Cupertino, Calif. company did not announce that the Camera app’s burst mode would be available for other iDevices. As such, no information concerning compatibility has been formally confirmed.

That being said, iDownloadBlog’s research indicates that the feature is available for the iPhone 5, iPhone 4s, iPad 3, and fifth-generation iPod touch. It seems that the iPhone 4, at least, is unable to support the feature due to “hardware limitations.”

The website continues:

It’s also worth noting, though, that the feature does not offer true continuous burst mode at 10 pictures per second as the one you’ll find on the iPhone 5s. Additionally, what Apple calls a “real time analysis” of your photos is nowhere to be found on any device and it’s safe to assume it will be an iPhone 5s feature only. Real-time analysis is where your phone looks at all of the photos you’ve taken and suggests individual shots or a sequence of photos that you might like best.

If you’re a registered iOS developer running iOS 7 GM, take a look at the new feature now, and let us know which iDevices you find it to be compatible with in the comments.

As a reminder, iOS 7 will be available to download on Wednesday, Sept. 18. Apple’s iPhone 5c and iPhone 5s go on sale two days later, on Sept. 20, though the former handset has been available to preorder online since Friday.

Update.

After checking Apple’s “iPhone – Compare Models” Web page, it seems the company’s official position on burst mode is that the feature is iPhone 5s only, rendering the above situation something of a mystery. Unless Apple has changed its position concerning burst mode, it therefore could be that we see the feature disappear from the aforementioned iDevices once iOS 7 is released on Wednesday, Sept. 18.

Apple’s “iPhone – Compare Models” Web page.

We’ll keep you posted.

For more of our recent news, see: Today’s Apps Gone Free: Air Keyboard, Fleet Of One, Let’s Settle Up Later And MoreConcepts 2.0 Introduces iOS 7-Optimized UI Plus New Major Sketching Enhancements, and Predictive Text Input App Fleksy Gains New Features Through New Major Update.