Which iPhone Should You Buy?

Published August 26, 2026 · Last reviewed September 2, 2026

Step 1: storage, the decision you cannot undo

Check what you currently use in Settings › General › iPhone Storage, then apply a simple rule: buy one tier above your current usage, and two tiers up if you shoot a lot of video or keep everything offline.

Storage cannot be added later, and a chronically full phone is slow, refuses updates, and occasionally will not save a photo. It is the one place where paying more is almost always right.

Step 2: size, the thing you handle every day

Larger phones win on video, reading, and battery life; smaller phones win on one-handed use, pockets, and weight. There is no correct answer, but there is a reliable test: go to a shop and hold both, reach your thumb to the far top corner, and put each in the pocket you actually use.

The most common regret reported by people who upgrade is buying the larger phone for the battery life and then finding it uncomfortable one-handed all day. Weight matters more than dimensions for that.

Step 3: camera, and whether Pro is worth it

Pro models generally add a dedicated telephoto lens, more advanced video formats, and more manual control. That is genuinely valuable if you shoot a lot of video, need optical zoom regularly, or care about the professional formats. For photographs shared on a phone screen, the difference between standard and Pro is far smaller than the marketing suggests — and much smaller than the difference between good and bad light.

The honest test: look at the photos you took last year. If most are people, food, and holidays shared to family, the standard model is enough. If you are regularly zooming or shooting video for something that matters, the Pro earns its price.

The options people overlook

Action

Consider last year's model, which typically drops in price when a new one launches.

Why it helps

It usually receives the same number of remaining iOS updates minus one year, for a meaningfully lower price, and the year-on-year differences are small.

Verification

Compare the two models' specifications directly and check what actually differs for your use.

Action

Consider a manufacturer-refurbished phone rather than a used one from a marketplace.

Why it helps

Refurbished units from Apple or a reputable seller come with a warranty and a new battery, which removes the main risk of buying used.

Verification

The listing states a warranty period and battery condition.

Action

Check the battery health before buying any used phone, and refuse anything without it.

Why it helps

A used phone at 79% capacity needs an immediate battery replacement, which changes the effective price considerably.

Verification

The seller shows the Battery Health screen, and it reads above 85%.

Action

Confirm Activation Lock is off on any second-hand purchase before paying.

Why it helps

A phone still tied to someone else's Apple Account cannot be set up at all, and this is the most common second-hand iPhone scam.

Verification

The phone is fully erased and shows the initial Hello setup screen, not a lock screen.

What genuinely does not matter for most people

• Processor generation. Every current iPhone is far faster than everyday use requires. It matters for demanding games and heavy video editing, and almost nowhere else.
• Screen refresh rate. Nice, and noticeable side by side. Not a reason to spend materially more.
• Colour. Most phones spend their life in a case.

The buying checklist

1. Read your current storage usage and add a tier.
2. Hold both sizes physically before deciding.
3. Look at last year's photos to decide whether the camera upgrade is real for you.
4. Price last year's model and a refurbished unit alongside the new one.
5. Take a verified backup before the switch, and keep the old phone for two weeks.

How it works

The three axes work on different timescales, which is why they deserve different weightings. Storage is fixed at manufacture and cannot be expanded, so it is the only genuinely irreversible choice — and its consequences compound, because a library grows every year while the capacity does not. Buying a tier up is not extravagance; it is buying the last two years of the phone's life.

Size is the variable you interact with most and evaluate worst. In a shop, a larger screen is immediately attractive; the costs — one-handed reach, weight in a pocket, holding it up in bed — only appear after weeks of daily use. That asymmetry between how the decision is made and how it is experienced is why physically holding both is worth more than reading any comparison.

Camera differences are real but concentrated in specific situations: optical zoom, low light, and video formats. A great deal of what people attribute to camera hardware is actually the computational processing shared across the whole current range, plus light and stability — which is why holding a phone steady in good light does more for a photograph than moving up a model tier. Judging from your own last year of photos, rather than from sample images shot by professionals, is the only reliable way to tell which case you are in.

Worked example

Someone replacing a 64 GB iPhone that has been full for two years, deciding between a current standard model at 128 GB, a current standard model at 256 GB, and a current Pro at 256 GB.

Storage first. The old phone shows 61 GB used with iCloud Photos already optimised, and the library grew roughly 14 GB in the past year. Projecting five years forward gives about 130 GB before any allowance for headroom, which rules out the 128 GB model immediately — it would be full within two years and the decision is irreversible.

Camera next. Reviewing the last year's photos: 1,900 images, of which about 40 used zoom beyond the main lens, and eleven minutes of video in total. The telephoto lens and professional video formats on the Pro would be used a handful of times a year, which does not justify the price difference for this person. Someone whose review showed 300 zoomed shots and hours of video would reach the opposite conclusion from the same method.

Size last. Both candidate models are held in a shop; the larger one is comfortable in the hand but does not fit the jacket pocket used daily, so the standard size wins.

Decision: the current standard model at 256 GB. Last year's equivalent is also priced, and comes out cheaper by enough to be tempting — but only in 128 GB locally, so the storage rule decides it. The verification arrives eighteen months later: 84 GB used, no storage warnings, and no regrets about the camera.