The core difference
The iPhone 15 to 16 jump is a smaller leap than 14 to 15 was — there's no new port standard or headline design change this time. The real differences are a new chip, a dedicated new button, and camera hardware. Whether that's worth the price gap depends on how you'd actually use them, and this guide walks through exactly where the practical differences show up.
What's genuinely new on the iPhone 16
A18 chip. A real generational step up from the 15's A16, with more headroom for demanding apps, on-device AI features, and general longevity — the kind of gap that matters more in year four or five of ownership than it does on day one. If you're the kind of buyer who keeps a phone until it genuinely stops being usable, this is the single most important difference on this list.
Camera Control button. A new dedicated capture button, physically new to the iPhone line — a genuine hardware addition rather than a software tweak, aimed at making the camera faster to access and use one-handed. Whether this matters to you depends entirely on how often you're actually reaching for the camera rather than using it occasionally.
Action Button on every model. This customisable button replaced the mute switch on the 15 Pro first; the 16 brings it to the entire standard line, so it's no longer a Pro-exclusive. It can be configured for a range of shortcuts — camera, flashlight, voice memo, or a custom shortcut — genuinely useful once you find a configuration that fits how you use your phone.
Larger batteries and a slightly bigger screen on the standard model. Modest, real improvements to everyday battery life rather than a dramatic change — worth knowing about, not worth basing your decision on alone.
What's genuinely the same
Both generations share USB-C, Dynamic Island across the whole line, and a 48MP main camera as standard — the 15 already delivered the big structural changes from the 14, so the 16 refines rather than reinvents. This is genuinely important context: if you've already decided you want a phone with these three features specifically, both generations deliver them, and the decision becomes purely about the 16's additional refinements versus the 15's lower price.
The real question: is the gap worth the price difference?
For most everyday use — calls, browsing, photos, social media, streaming — the practical difference between A16 and A18 is smaller than the spec sheet implies. Where the 16 earns its premium is in two specific, real scenarios:
You keep your phones a long time. A newer chip means a longer runway of smooth performance and software support — if you're buying to keep for four-plus years, the 16's extra headroom compounds in your favour. This is genuinely the strongest, most defensible reason to pay the premium.
You genuinely use the camera a lot. The Camera Control button and refined camera hardware are real, tangible upgrades if photography or video is a regular part of how you use your phone — less so if the camera is an afterthought.
If neither of those describes you, the 15's lower refurbished price for a phone that already has USB-C, Dynamic Island and a 48MP camera makes it the more efficient buy.
A practical way to decide
Ask yourself two honest questions. First: do you typically keep phones for two years or less, or four-plus? If it's the shorter end, the 16's chip advantage matters less, since you'll likely upgrade again before it becomes relevant. Second: is the camera something you use deliberately — framing shots, editing photos, taking video seriously — or mostly just a convenience for quick snapshots? If it's the latter, the 15's camera is already genuinely capable enough that the 16's improvements may not be noticeable in how you'd actually use it.
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GadgetRank verdict
Buy the 16 if: you keep phones for years and want the extra chip headroom, or the camera is genuinely important to how you use your phone.
Buy the 15 if: you want the same core experience — USB-C, Dynamic Island, 48MP camera — for a lower refurbished price, and don't need the newest chip specifically.
Frequently asked questions
Is the price difference between the 15 and 16 worth it for most people?
For genuinely average, everyday use, the practical difference is smaller than the spec sheet suggests — the honest answer is that it depends more on how long you plan to keep the phone than on any single feature.
Does the iPhone 16 have a significantly better camera than the 15?
The core camera hardware is similar; the 16's real camera advantage is the Camera Control button making it faster and more deliberate to use, rather than a dramatically different sensor or image quality.
Will the iPhone 15 still receive software updates in a few years?
Yes — Apple's typical support window suggests continued updates well into the early 2030s for the 15, though the 16, being newer, will likely receive updates for longer still.
Is the Action Button worth having if I've never used one before?
Most people who try it find a genuinely useful configuration within the first few days — it's a small but real quality-of-life addition once you've set it to something you actually use regularly.
Related reading: Refurbished iPhone 15 UK 2026 — full buying guide · Is a refurbished iPhone 15 worth buying in 2026? · Refurbished iPhone 14 UK 2026 · Should I buy an iPhone 16 in 2026? · Best Phone Under £500 UK 2026 · Compare live iPhone prices · Condition grades explained
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