iPhone 18 Pro vs Samsung Galaxy S26 Ultra

These are the phones at the top of their makers' line-ups, and most of what separates them follows from the first choice: iOS or Android. Past that, the iPhone 18 Pro is a 6.3-inch phone with three 48MP lenses and up to 36 hours of quoted video playback; the Galaxy S26 Ultra is a 6.9-inch one with four rear cameras, optical zoom at two focal lengths, an S Pen in the body and a published seven-year security-update commitment.

Overview

Two flagships, one from each ecosystem, and the ecosystem is the part most people settle first. The iPhone 18 Pro runs iOS 27 and starts at $1,199. The Galaxy S26 Ultra runs Android 16 with One UI 8.5 and starts at $1,399.99. Both are glass-and-metal slabs rated IP68, both have 120Hz displays, and both start at 256GB.

The platform decision

This is not a tiebreaker, it is the question. A phone is the thing every other device you own talks to, so the watch on your wrist, the tablet on the table and the messages your friends send all point at one of these two answers before any specification does. If you already have an answer, most of what follows is detail. If you do not, nothing below will settle it for you — it is a choice about where you want to live, not about which column is longer.

Key differences

Five things separate them once the platform is set. Size: 6.3 inches against 6.9. Cameras: three lenses against four, with one telephoto against two. Battery: Apple quotes 36 hours of video playback, Samsung 31. Software support: Samsung publishes a seven-year commitment and Apple publishes none. And price, $1,199 against $1,399.99 before any storage upgrade.

Display

Both run at 120Hz. The iPhone 18 Pro is 6.3 inches, an OLED Super Retina XDR at 2622x1206 and 460 ppi with ProMotion, Always-On and the Dynamic Island. The Galaxy S26 Ultra is 6.9 inches, a QHD+ Dynamic AMOLED 2X with an adaptive refresh rate from 1 to 120Hz and Vision Booster. Apple quotes 3000 nits peak outdoor and Samsung quotes 2600 nits peak; the two are not stated under the same condition, so each is that maker's own figure rather than a number to put side by side. The honest difference here is six-tenths of an inch of screen.

Camera

The architectures are genuinely different, and megapixels are the least useful way to see it. The iPhone 18 Pro carries three 48MP lenses: a main with a variable aperture from f/1.48 to f/4.0 at 24 mm, an ultra wide at 13 mm, and one telephoto at 100 mm, which is 4x. The Galaxy S26 Ultra carries four: a 200MP wide at F1.4, a 50MP ultra wide at F1.9, a 50MP telephoto at F2.9 which Samsung rates at 5x optical, and a 10MP telephoto at F2.4 at 3x optical. So the Samsung gives you optical zoom at two focal lengths where the Apple gives you one, and the Apple gives you a lens that can change its aperture where the Samsung does not. Which of those matters is a question about the photographs you actually take.

Battery and charging

Video playback is the one figure both makers publish under the same label: up to 36 hours for the iPhone 18 Pro, up to 31 for the Galaxy S26 Ultra. Capacity is not comparable — Samsung states a 5,000 mAh typical capacity and Apple states none — so the hours are the comparison and the milliamp-hours are not. Charging is quoted to different targets under different conditions: the iPhone reaches 50% in around 15 minutes with a 60W-capable adapter and Adjustable Voltage Supply, the Galaxy reaches 75% in around 30 minutes with a 60W adapter. Those are two different claims, not two scores.

Software support

Samsung publishes a commitment of seven years of security updates for the Galaxy S26 series. Apple publishes no equivalent minimum period for the iPhone 18 Pro. That is a difference in what the two companies state, and it is worth knowing when you are spending this much on something you intend to keep. It is not a measurement of how long either phone will actually be supported, and the absence of an Apple figure is not evidence of a shorter window.

Storage and price

Both start at 256GB. The iPhone 18 Pro goes to 2TB, at $2,399 for that configuration, and starts at $1,199. The Galaxy S26 Ultra goes to 1TB, at $1,999.99, and starts at $1,399.99; Samsung also publishes the memory each tier ships with, 12GB below 1TB and 16GB at it, which Apple does not state.

Size and water resistance

The Galaxy S26 Ultra is the larger phone by a clear margin — 163.6 mm tall and 78.1 mm wide against 150.0 by 71.9 — though it is the thinner of the two at 7.9 mm against 8.75, and the weights are within three grams of each other at 214 and 211. Both are rated IP68; Apple states a maximum depth of 6 metres for 30 minutes and Samsung states 1.5 metres for 30 minutes.

Which one may fit you better

Consider the iPhone 18 Pro if you are already on iOS, you want the longer quoted video playback, you would rather carry 6.3 inches than 6.9, or you want a main camera whose aperture changes. Consider the Galaxy S26 Ultra if you are on Android, you want optical zoom at both 3x and 5x, you write or draw on your phone and want the S Pen in the body, or a published update window matters to you.

Important considerations

The platform is the decision and everything else is a detail inside it, so if you already know which side you are on, read the column that applies to you and skip the other. If you genuinely have no preference, the two real questions are how big a phone you want to hold and whether a second telephoto is worth $200 and six-tenths of an inch. Neither of those has a right answer.