Everything we know about iPhone Duo & iPhone 18 | Should you buy?

From the original iPhone to Apple's first folding iPhone: how much has actually changed? We compare every generation's screen, processor, main camera, launch storage and major design changes, then spend more time on the iPhone 18 Pro, 18 Pro Max and Duo announced on September 9, 2026. The final verdict asks which features would make a real difference in everyday use. New-model conclusions are based on announced specifications, not hands-on testing. Prices shown are US starting prices before tax. Apple's performance and display-area claims are labeled. A change in megapixels, storage or screen size is not an overall quality score. CHAPTERS 00:00 The road to today 00:13 Original, 3G, and 3GS 00:32 iPhone 4, 4S, and 5 00:53 5c, 5s, 6 family, and 6s family 01:16 First SE, iPhone 7, and 7 Plus 01:34 iPhone 8, 8 Plus, and X 01:55 XS, XS Max, XR, and the 11 family 02:16 Second SE and the 12 family 02:35 13 family, third SE, and 14 family 02:59 The 15 and 16 families 03:27 16e, 17, Air, 17 Pro, Pro Max, and 17e 04:01 18 Pro and Pro Max: screen and design 04:28 18 Pro: the camera upgrade 05:08 18 Pro: processor and performance claims 05:33 18 Pro: storage and price 06:01 Duo: the design changes shape 06:36 Duo: more space, and what it enables 07:06 Duo: cameras and the folding advantage 07:35 Duo: processor, storage, and cost 08:02 Duo: the practical questions 08:18 Should you upgrade to 18 Pro? 08:45 Should you buy Duo? SOURCES Apple's iPhone model reference: https://support.apple.com/en-us/108044 Original iPhone announcement: https://www.apple.com/newsroom/2007/01/09A... iPhone 4 announcement: https://www.apple.com/newsroom/2010/06/07A... iPhone X announcement: https://www.apple.com/newsroom/2017/09/the... iPhone 18 Pro and Pro Max announcement: https://www.apple.com/newsroom/2026/09/app... iPhone 18 Pro and Pro Max specifications: https://www.apple.com/iphone-18-pro/specs/ iPhone Duo announcement: https://www.apple.com/newsroom/2026/09/app... iPhone Duo specifications: https://www.apple.com/iphone-duo/specs/ iPhone Duo overview and feature availability: https://www.apple.com/iphone-duo/ VISUAL CREDITS Product reference imagery: Apple Support. Launch images and source footage: Apple Newsroom. Copyright Apple; no open license is asserted. Editorial crops, layout, labels and scene timing were added for this independent comparison. This is not an Apple production or endorsement. Individual source URLs are preserved in the companion project credits. Narration: the creator's own recorded voice, edited for pauses and lightly cleaned for background noise. No synthesized narration. MUSIC CREDIT Music by https://www.bensound.com/free-music-for-vi... License code: TZOZZJ1ECHE1XDNL Artist: Benjamin Tissot #iPhone #iPhoneDuo #iPhone18Pro