Comparing Apple's iPhone 14 to previous iPhone generations, so you can make sure it's worth the money to move up.

The $799 (£849, AU$1,399) iPhone 14 brings modest improvements that are appreciated but not game-changing, like nitty-gritty camera improvements, car-crash detection and the support for satellite-based emergency messaging.

The recently discounted $699 iPhone 13 or the smaller $599 13 Mini could be a good option if you still want more storage, faster performance and an improved camera, especially if you are coming from a phone that's three years old or more.

It's also the only option if you want the smaller Mini and its 5.4-inch screen, since the iPhone 14 line eliminates that size in favor of the new $899 iPhone 14 Plus with a 6.7-inch screen. .

The iPhone 14 lineup introduces new features such as car-crash detection, the removal of the physical SIM card for US phones, and enhanced cameras on the rear and front.

And even though Apple finally got rid of the infamous notch in the Pro Models, the 14 and 14 Plus still have one -- it's the same smaller notch that debuted on the iPhone 13 series.

The iPhone 14 and iPhone 14 Plus have the A15 Bionic chip from last year's iPhone 13 Pro and iPhone 13 Pro Max.

The bottom line: If you have an iPhone 13 or 13 Pro, don't upgrade.

Even though the iPhone 12 lineup was released two years ago, they still share many similarities with Apple's latest phones.

The iPhone 14 received a few notable camera upgrades, like a larger sensor, a new lens with a faster aperture, improved photo processing and Action Mode which makes the movements in videos look smoother when you record them.

The bottom line: Hold onto your iPhone 12 for another year since the iPhone 14 isn't dramatically different.

The bottom line: The iPhone 14 lineup includes enough changes to justify upgrading from the iPhone 11.

The XS's front camera has a lower 7-megapixel resolution compared to the larger and newer 12-megapixel sensor on the iPhone 14.

If you're upgrading from an iPhone XR, you'll also get an additional camera with an ultrawide lens for taking broader group shots for the first time. .

The iPhone 14 also has a larger 6.1-inch screen compared to the iPhone XS' 5.8-inch display (the iPhone XS Max has a 6.5-inch screen, while the XR's screen is also 6.1 inches).

The bottom line: If you have an iPhone XS, XS Max or XR, it's definitely worth upgrading.

The iPhone X is about five years old, which means it probably feels slow and its battery life isn't what it used to be.

The iPhone X also has a dual-lens camera similar to that of the iPhone XS, meaning it's missing the iPhone 14's camera hardware improvements in addition to Night mode, Deep Fusion and the ability to control depth-of-field and blur levels in Portrait mode.

Like the iPhone XS, you're only getting a 7-megapixel front camera compared to a 12-megapixel selfie camera on Apple's newer phones.

The bottom line: If you have the iPhone X, it's time to upgrade.

The iPhone 8 and 8 Plus.

The iPhone 8 generation has Apple's legacy iPhone design, which is fitting for a phone that's now five years old.

If you prefer Touch ID over Face ID, especially since it's difficult to use Face ID while wearing a mask, you might want to at least consider upgrading to the $429 iPhone SE, since it has the same processor as the iPhone 13, 5G compatibility and plenty of photography improvements inside a similar body to the iPhone 8.

The iPhone 7 Plus and iPhone 7

The iPhone 7 runs on an aging A10 Fusion processor, which doesn't even have a neural engine and is several years behind Apple's latest technology

If you've owned an iPhone 7 for several years, it's probably bursting at the seams since it has substantially less storage space