iPhone 18 Pro Max vs iPhone 15 Pro Max
3 generations apart: every figure Apple publishes for both, side by side. 7 headline measures favour the iPhone 18 Pro Max and 2 the iPhone 15 Pro Max, and 12 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 18 Pro Max suits field and lone-worker teams, executives and client-facing staff, volume fleets and shared devices, international travel and roaming, marketing, site records and content, replacing a second screen on the road. iPhone 15 Pro Max suits one-handed, all-day carry. Apple publishes no benchmark scores for either phone, so nothing here claims one is “faster”.
12 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 18 Pro Max
iPhone 15 Pro Max
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 18 Pro Max if…
- Screen size: 6.9″ against 6.7″.
- Usable screen area: 116.7 cm² against 110.2 cm².
- Video playback: 43 hrs against 29 hrs.
- Capacity: Up to 2TB against Up to 1TB.
- Peak brightness outdoors: 3000 nits against 2000 nits.
- Longest optical zoom: 8× against 5×.
Choose the iPhone 15 Pro Max if…
- Weight: 221 g against 249 g.
- Thickness: 8.25 mm against 8.75 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 18 Pro Max | iPhone 15 Pro Max | |
|---|---|---|
| Capacity | Up to 2TB | Up to 1TB |
| Options | 256GB, 512GB, 1TB, 2TB | 256GB, 512GB, 1TB |
Display
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| 6.9-inch (diagonal) all-screen OLED display | 6.7-inch (diagonal) all-screen OLED display |
| 2868x1320-pixel resolution at 460 ppi | 2796x1290-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 18 Pro Max | iPhone 15 Pro Max | |
|---|---|---|
| Height | 163.4 mm (6.43 inches) | 159.9 mm (6.29 inches) |
| Width | 78.0 mm (3.07 inches) | 76.7 mm (3.02 inches) |
| Depth | 8.75 mm (0.34 inches) | 8.25 mm (0.32 inches) |
| Weight | 249 grams (8.78 ounces) | 221 grams (7.81 ounces) |
Chip
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| A20 Pro chip | A17 Pro chip |
| 6-core CPU with 2 super cores and 4 efficiency cores | 6-core CPU with 2 performance and 4 efficiency cores |
| 7-core GPU with Neural Accelerators | 6-core GPU |
| Dual 16-core Neural Engine | 16-core Neural Engine |
Rear cameras
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| 48MP Pro Fusion camera system | Pro camera system |
| 48MP Fusion Main with variable aperture 48MP Fusion Ultra Wide 48MP Fusion Telephoto | 48MP Main 12MP Ultra Wide 12MP Telephoto |
| Second-generation sensor-shift optical image stabilisation (Fusion Main) 3D sensor-shift optical image stabilisation (Fusion Telephoto) | Second-generation sensor-shift optical image stabilisation (Main) |
| 0.5x, 1x, 2x, 4x, 8x optical zoom options 0.5x, 1x, 2x, 4x, 8x optical zoom options | 0.5x, 1x, 2x, 5x optical zoom options 0.5x, 1x, 2x, 5x optical zoom options |
| ƒ/1.48, ƒ/1.8, ƒ/2.8, ƒ/4.0 variable aperture options (Fusion Main) | — |
| Pro controls for lens aperture, shutter speed, white balance and viewing histogram | — |
| Photographic Styles 3 | Photographic Styles |
| Smart focus tracking | — |
| Apple Reference Image (Fusion Main) | — |
Video recording
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| 4K Dolby Vision video recording up to 120 fps (Fusion Main), up to 60 fps (Fusion Ultra Wide, Fusion Telephoto) | 4K Dolby Vision video recording up to 60 fps |
| Cinematic mode for recording videos with shallow depth of field (up to 4K Dolby Vision at 60 fps) | Cinematic mode for recording videos with shallow depth of field (up to 4K Dolby Vision at 30 fps) |
| Cinematic mode effects from video | — |
| Pro controls for lens aperture, shutter speed, white balance and viewing histogram | — |
| Smart focus tracking | — |
| Improved low-light video | — |
| Dual Capture (up to 4K Dolby Vision at 30 fps) | — |
| ProRes video recording up to 4K at 120 fps with external recording | ProRes video recording up to 4K at 60 fps with external recording |
| ProRes RAW | — |
| Apple Log 2 video recording | Apple Log video recording |
| Genlock support | — |
| Slo-mo video support for 1080p up to 240 fps and 4K Dolby Vision up to 120 fps (Fusion Main) | Slo-mo video support up to 1080p at 240 fps |
| Time-lapse video recording with stabilisation up to 4K Dolby Vision | — |
| QuickTake video (up to 4K at 60 fps in Dolby Vision HDR) | QuickTake video |
| Second-generation sensor-shift optical image stabilisation (Fusion Main) 3D sensor-shift optical image stabilisation (Fusion Telephoto) | Second-generation sensor-shift optical image stabilisation (Main) |
| Spatial Audio and stereo recording | Stereo recording |
| Studio-quality four-mic array | — |
| Wind noise reduction | — |
| Audio Mix | — |
Front camera
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| 18MP Center Stage front camera | TrueDepth front camera |
| 18MP photos | 12MP photos |
| Centre Stage for photos | — |
| Dual Capture | — |
| Centre Stage for video calls | — |
| Tap to zoom and rotate | — |
| Ultra-stabilised video | — |
| Photographic Styles 3 | Photographic Styles |
| Smart focus tracking | — |
| Improved low-light video | — |
| Cinematic mode effects from video | — |
| Time-lapse video recording with stabilisation up to 4K Dolby Vision | — |
| QuickTake video (up to 4K at 60 fps in Dolby Vision HDR) | QuickTake video |
Power and battery
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| Up to 43 hours | Up to 29 hours |
| Up to 38 hours | Up to 25 hours |
| Up to 50% charge in around 15 minutes when using 60W-capable adapter or higher with Adjustable Voltage Supply (available separately) paired with USB-C charging cable | Up to 50% charge in 35 minutes with or higher (available separately) paired with USB-C charging cable 20W adapter |
| Up to 50% charge in 30 minutes with 35W adapter or higher paired with MagSafe Charger (both available separately) | — |
Mobile and wireless
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| Wi-Fi 7 | — |
| Bluetooth 6 | Bluetooth 5.3 |
| Express Cards with power reserve | Express Cards with Power Reserve |
| — | Wi-Fi 6E |
Secure authentication
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| Enabled by TrueDepth technology in the Center Stage front camera | Enabled by TrueDepth front camera for facial recognition |
SIM
| iPhone 18 Pro Max | iPhone 15 Pro Max |
|---|---|
| Dual SIM (two active eSIMs, or nano-SIM and eSIM) Dual eSIM support Supports advanced eSIM technology for more convenience and security. | Dual SIM (two active eSIMs, or nano-SIM and eSIM) Dual eSIM support Supports advanced eSIM technology for more convenience and security |
iPhone 18 Pro Max vs iPhone 15 Pro Max, answered
What is the real difference between the iPhone 18 Pro Max and the iPhone 15 Pro Max?
A20 Pro replaces A17 Pro — the graphics go from “6-core GPU” to “7-core GPU with Neural Accelerators”, and the Neural Engine from “16-core Neural Engine” to “Dual 16-core Neural Engine”. Apple publishes no benchmark for either, so how much of that reaches a user depends entirely on the apps. Video playback goes from 29 hours to 43 — up 14 hours (48%) on Apple’s own measure. The display moves from 6.7″ to 6.9″, which is 6% more usable area.
Is the iPhone 18 Pro Max worth upgrading to from the iPhone 15 Pro Max for business use?
That depends on what the phones are used for. The iPhone 18 Pro Max leads on field and lone-worker teams, executives and client-facing staff, volume fleets and shared devices, international travel and roaming, marketing, site records and content and replacing a second screen on the road. The iPhone 15 Pro Max still leads on one-handed, all-day carry. Battery is the figure most fleets feel: 43 hours against 29 on Apple's own video-playback test.
Which has better battery life, the iPhone 18 Pro Max or the iPhone 15 Pro Max?
Apple quotes up to 43 hours of video playback for the iPhone 18 Pro Max and up to 29 hours for the iPhone 15 Pro Max — a 48% difference on the same test. Streamed video, which is closer to real use, is 38 hours against 25.
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 Pro Max 3 generations further through that window than the iPhone 18 Pro Max. 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 18 Pro Max specifications and iPhone 15 Pro Max 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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