iPhone 17 vs iPhone 15
2 generations apart: every figure Apple publishes for both, side by side. 5 headline measures favour the iPhone 17 and 2 the iPhone 15, and 8 specifications differ outright. Written for the people who buy phones by the dozen rather than one at a time: what changed, what it changes about a rollout, and what it does not.
Bottom line. iPhone 17 suits field and lone-worker teams, executives and client-facing staff, volume fleets and shared devices, international travel and roaming, replacing a second screen on the road. iPhone 15 suits one-handed, all-day carry. Apple publishes no benchmark scores for either phone, so nothing here claims one is “faster”.
8 specifications that are not the same
Everything below is a line Apple publishes for both phones. Anything the two share — and most of the specification is shared — is in the full table further down.
The measures that decide it
Each row is a figure Apple publishes for both. Bars show the split; the badge marks the larger number, which is not always the better buy — a lighter phone and a smaller screen are the same fact stated twice.
Both phones, drawn to the same scale
Outlines plotted from Apple’s published millimetres, at one scale, so the difference is the real one rather than two press photographs cropped to the same height.
Usable screen area
What you are actually handing to staff
Apple’s own product photography for both models — finishes, the back of each phone, and the details that differ. Every image here is Apple’s, unedited.
iPhone 17
iPhone 15
Which one, and why
Drawn from the measures above. Apple publishes no benchmark results for either phone, so nothing here claims one is faster than the other — only what each one is documented to do.
Choose the iPhone 17 if…
- Screen size: 6.3″ against 6.1″.
- Usable screen area: 97.2 cm² against 91.3 cm².
- Video playback: 30 hrs against 20 hrs.
- Peak brightness outdoors: 3000 nits against 2000 nits.
- Front camera: 18 MP against 12 MP.
- Fits best for field and lone-worker teams, executives and client-facing staff, volume fleets and shared devices, international travel and roaming and replacing a second screen on the road — a full shift away from a charger with satellite SOS behind it.
Choose the iPhone 15 if…
- Weight: 171 g against 177 g.
- Thickness: 7.8 mm against 7.95 mm.
- Fits best for one-handed, all-day carry — weight and thickness for staff who carry a phone in a pocket for ten hours.
Where each one pulls ahead
Seven ways a business actually deploys phones. Each call is made on published specifications only, with the figures behind it shown — no opinion about how the screens look.
Battery, zoom, capacity and where the chips sit
Four charts drawn from the same specification files as the tables below, on shared axes so the two ranges can be read against each other.
Battery, on Apple’s own tests
Optical zoom
Capacity
Where each chip sits in the line
The differences that reach IT, not the user
Enrolment, SIM provisioning, unlock policy and the software clock — the things that decide whether a model can actually be rolled out, and the ones a spec sheet buries.
SIM and provisioning
Both enrol the same way in Apple Business Manager; what differs is whether a physical SIM is an option when a carrier or a country is not eSIM-ready.
Unlock method
Face ID and Touch ID satisfy the same MDM passcode policies; the practical difference is gloves, masks and shared-device handover.
Water and dust
Apple’s rating is tested in laboratory conditions and is not permanent — it is not a substitute for a rugged case on a site fleet.
Safety features
Satellite features are the reason many lone-worker policies now specify a recent iPhone rather than any smartphone.
Wired transfer
A 10Gb/s port matters where devices are imaged, backed up or evidence-collected over cable rather than over the air.
Wireless
Wi-Fi generation decides how a device behaves on a busy corporate WLAN long before it decides raw speed.
Software generation
Both run the current iOS. The older model simply started its update life earlier, which is the clock a fleet should be planned against.
Side by side, differences first
Every line Apple publishes for both phones, in Apple’s own grouping and wording. The default view hides the rows where the two are identical.
Capacity
| iPhone 17 | iPhone 15 |
|---|---|
| — | 128GB |
Display
| iPhone 17 | iPhone 15 |
|---|---|
| 6.3-inch (diagonal) all-screen OLED display | 6.1-inch (diagonal) all-screen OLED display |
| ProMotion technology with adaptive refresh rates up to 120Hz | — |
| Always-On display | — |
| 2622x1206-pixel resolution at 460 ppi | 2556x1179-pixel resolution at 460 ppi |
| 3,000 nits peak brightness (outdoor) | 2,000 nits peak brightness (outdoor) |
| 1 nit minimum brightness | — |
Size and weight
| iPhone 17 | iPhone 15 |
|---|---|
| 149.6 mm (5.89 inches) | 147.6 mm (5.81 inches) |
| 71.5 mm (2.81 inches) | 71.6 mm (2.82 inches) |
| 7.95 mm (0.31 inches) | 7.80 mm (0.31 inches) |
| 177 grams (6.24 ounces) | 171 grams (6.02 ounces) |
Apple Intelligence
| iPhone 17 | iPhone 15 |
|---|---|
| The next generation of Apple Intelligence is centred around you, integrated into your apps and built with privacy. Apple Intelligence powers Siri AI — an entirely new version of Siri that’s more personal, conversational and powerful, along with helpful features across apps. | — |
| Learn more | — |
Chip
| iPhone 17 | iPhone 15 |
|---|---|
| A19 chip | A16 Bionic chip |
| 5-core GPU with Neural Accelerators | 5-core GPU |
| Hardware-accelerated ray tracing | — |
Rear cameras
| iPhone 17 | iPhone 15 |
|---|---|
| 48MP Dual Fusion camera system | Dual-camera system |
| 48MP Fusion Main 48MP Fusion Ultra Wide | 48MP Main 12MP Ultra Wide |
| Sensor-shift optical image stabilisation (Fusion Main) | Sensor-shift optical image stabilisation (Main) |
| Photographic Styles 2 | Photographic Styles |
| Macro photography | — |
| Spatial photos | — |
Video recording
| iPhone 17 | iPhone 15 |
|---|---|
| Dual Capture (up to 4K Dolby Vision at 30 fps) | — |
| Spatial video recording at 1080p at 30 fps | — |
| Macro video recording, including slo-mo and time-lapse | — |
| QuickTake video (up to 4K at 60 fps in Dolby Vision HDR) | QuickTake video |
| Sensor-shift optical image stabilisation (Fusion Main) | Sensor-shift optical image stabilisation (Main) |
| Spatial Audio and stereo recording | Stereo recording |
| Wind noise reduction | — |
| Audio Mix | — |
Front camera
| iPhone 17 | iPhone 15 |
|---|---|
| 18MP Center Stage front camera | TrueDepth front camera |
| 18MP photos | 12MP photos |
| Centre Stage for photos | — |
| Dual Capture | — |
| Centre Stage for video calls | — |
| Ultra-stabilised video | — |
| Photographic Styles 2 | Photographic Styles |
| QuickTake video (up to 4K at 60 fps in Dolby Vision HDR) | QuickTake video |
Power and battery
| iPhone 17 | iPhone 15 |
|---|---|
| Up to 30 hours | Up to 20 hours |
| Up to 27 hours | Up to 16 hours |
| Up to 50% charge in 20 minutes with 40W adapter or higher (available separately) paired with USB-C charging cable | Up to 50% charge in 30 minutes with or higher (available separately) paired with USB-C charging cable 20W adapter |
| Up to 50% charge in 30 minutes with or higher paired with MagSafe Charger (both available separately) 30W adapter | — |
Mobile and wireless
| iPhone 17 | iPhone 15 |
|---|---|
| Wi-Fi 7 | — |
| Bluetooth 6 | Bluetooth 5.3 |
| Thread networking technology | — |
| Precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou and NavIC) | GPS, GLONASS, Galileo, QZSS and BeiDou |
| — | Wi-Fi 6 |
Secure authentication
| iPhone 17 | iPhone 15 |
|---|---|
| Enabled by TrueDepth technology in the Center Stage front camera | Enabled by TrueDepth front camera for facial recognition |
Siri
| iPhone 17 | iPhone 15 |
|---|---|
| Activate hands-free with only your voice using “Siri” or “Hey Siri”, or use Type to Siri | Activate hands-free with only your voice using “Siri” or “Hey Siri” |
| Powered by Apple Intelligence, Siri is more natural and helpful | — |
iPhone 17 vs iPhone 15, answered
What is the real difference between the iPhone 17 and the iPhone 15?
A19 replaces A16 Bionic — the graphics go from “5-core GPU” to “5-core GPU with Neural Accelerators”. Apple publishes no benchmark for either, so how much of that reaches a user depends entirely on the apps. Video playback goes from 20 hours to 30 — up 10 hours (50%) on Apple’s own measure. The display moves from 6.1″ to 6.3″, which is 6% more usable area.
Is the iPhone 17 worth upgrading to from the iPhone 15 for business use?
That depends on what the phones are used for. The iPhone 17 leads on field and lone-worker teams, executives and client-facing staff, volume fleets and shared devices, international travel and roaming and replacing a second screen on the road. The iPhone 15 still leads on one-handed, all-day carry. Battery is the figure most fleets feel: 30 hours against 20 on Apple's own video-playback test.
Which has better battery life, the iPhone 17 or the iPhone 15?
Apple quotes up to 30 hours of video playback for the iPhone 17 and up to 20 hours for the iPhone 15 — a 50% difference on the same test. Streamed video, which is closer to real use, is 27 hours against 16.
Can both be managed and enrolled the same way?
Yes. Both are enrolled through Apple Business Manager with automated device enrolment and managed by whichever MDM you already run, and both take the same configuration profiles. The differences that affect IT are the unlock method (Face ID against Face ID) and how long each will keep receiving iOS feature updates.
How long will each one keep getting iOS updates?
Apple does not publish a support end date for any iPhone. What history shows is roughly five to seven years of iOS releases from launch, which puts the iPhone 15 2 generations further through that window than the iPhone 17. Plan a fleet on the older model's clock, not the newer one's.
Where these figures come from. Every specification on this page is taken from Apple’s own published material — iPhone 17 specifications and iPhone 15 specifications, cross-checked against Apple’s compare tool, captured 12 September 2026. Screen areas and percentage differences are calculated from those figures. This is a specification comparison only: nothing here is a benchmark, a price or a statement about stock.
Other iPhone comparisons
Buying for a team rather than a person? The same approach applies to laptops — see the business laptop finder, the hardware refresh planner for what a phone and laptop cycle costs together, and every other comparison we publish.
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