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On the specifications each company publishes, neither phone beats the other across the board. The iPhone 18 Pro Max has the larger, denser display, the wider storage range (up to 2TB), and Apple’s A20 Pro chip. The OnePlus 15 has a higher listed gaming refresh ceiling (165Hz), a listed 7,300mAh typical battery, a listed 80W wired charging rate in the US, and a lower reported starting price. In US pricing, the OnePlus 15 starts at $899.99 and the iPhone 18 Pro Max is reported to start at $1,299, a difference of $399.01 between the two base models. That gap compares starting configurations only, and it is a US figure.
Specifications side by side
| Area | iPhone 18 Pro Max | OnePlus 15 |
|---|---|---|
| Display | 6.9-inch OLED, 2868 × 1320, 460 ppi | 6.78-inch, 2772 × 1272, 450 ppi |
| Refresh rate | ProMotion adaptive refresh up to 120Hz | Adaptive 1–120Hz; up to 165Hz in gaming |
| Chip / platform | Apple A20 Pro | Qualcomm Snapdragon 8 Elite Gen 5; OxygenOS 16 based on Android 16 |
| Memory | Not stated in Apple’s technical specifications page | 12GB or 16GB |
| Storage | 256GB, 512GB, 1TB, 2TB | 256GB (with 12GB RAM) or 512GB (with 16GB RAM) |
| Battery | Battery mAh figure not established in the sources used here | 7,300mAh typical |
| Wired charging | Not established as a comparable figure in the sources used here | 80W SUPERVOOC (US) |
| Wireless charging | Not established as a comparable figure in the sources used here | 50W AIRVOOC (US) |
| Rear cameras | 48MP camera system: main, ultra-wide, and telephoto | Triple 50MP: main, ultra-wide, and telephoto (3.5× optical; 7× optical-quality zoom) |
| Front camera | Not stated in the sources used here | 32MP |
| US starting price | From $1,299 (reported) | $899.99 (12GB/256GB) |
Spec-by-spec breakdown
Display
Apple lists the iPhone 18 Pro Max with a 6.9-inch OLED panel at 2868 × 1320 pixels and 460 ppi, with ProMotion adaptive refresh up to 120Hz. OnePlus lists the OnePlus 15 at 6.78 inches, 2772 × 1272 pixels and 450 ppi, with adaptive refresh from 1Hz to 120Hz and up to 165Hz in gaming. Apple measures its diagonal as a standard rectangle, so the rounded-corner viewable area is slightly smaller than the headline figure.
The 165Hz number is a gaming ceiling, not the rate the phone holds in everyday use, and the published material does not show how often either phone reaches its top rate. Refresh rate also says little about brightness, colour accuracy, or panel quality, which these spec listings do not measure.
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The two phones run on different mobile platforms. The iPhone 18 Pro Max uses Apple’s A20 Pro, and the OnePlus 15 uses Qualcomm’s Snapdragon 8 Elite Gen 5 with OxygenOS 16 on Android 16. No comparable benchmark result is established in the material behind this article, so it does not name a speed winner.
#1 Best Overall
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
Memory is only partly comparable. OnePlus lists 12GB or 16GB of RAM alongside its storage options. Apple’s specifications list storage tiers from 256GB to 2TB but do not state RAM, so the two cannot be matched on memory.
Battery and charging
OnePlus lists a 7,300mAh typical battery for the OnePlus 15. Apple’s support page reports battery and charging features for the iPhone 18 Pro Max, but a directly comparable mAh figure is not established, so the capacity comparison runs in only one direction. Capacity is also not runtime. Screen size, refresh settings, network conditions, and software all shape how long a charge lasts, and no matched endurance test is used here.
Rank #2
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
OnePlus’s US specifications list 80W SUPERVOOC wired charging and 50W AIRVOOC wireless charging. Its North American launch release says US and Canadian units include a charging brick and cable in the box, and that the US version supports up to 80W wired charging, with an optional adapter enabling up to 100W. International versions can reach up to 120W wired charging. The charging speed you get therefore depends on the market where you buy.
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Cameras
OnePlus lists three 50MP rear cameras: main, ultra-wide, and a telephoto with 3.5× optical zoom and 7× optical-quality zoom, plus a 32MP front camera. Apple lists a 48MP camera system with main, ultra-wide, and telephoto lenses. Apple’s full specification page covers capture limits and regional details that this comparison does not reproduce.
Rank #3
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
Megapixel counts do not establish photo quality, and this comparison includes no independent camera results, so it does not declare a camera winner.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price difference
| Model and configuration | US price | Source and date |
|---|---|---|
| OnePlus 15, 12GB/256GB | $899.99 | OnePlus North American launch release, November 13, 2025 |
| OnePlus 15, 16GB/512GB | $999.99 | OnePlus North American launch release, November 13, 2025 |
| iPhone 18 Pro Max, starting configuration (capacity not stated in the report) | From $1,299 (reported) | Tom’s Guide, September 9, 2026 (secondary report) |
Comparing the two starting prices gives a $399.01 difference ($1,299 minus $899.99). That subtraction only holds if the reported $1,299 applies to the same 256GB tier as the OnePlus base model, and the report does not say which capacity the starting price covers. At 512GB, the sources give an OnePlus price of $999.99 but no iPhone price, so no gap can be stated for that tier.
Rank #4
- BIGGER, YET SLIMMER THAN EVER: Who would’ve guessed that wider could also be lighter? The design of Galaxy Z Fold7 is refined to feel like a traditional smartphone with its expanded cover display.
- BEST CAMERA ON A FOLD YET: You asked for more – now you can have the most. Galaxy Z Fold7 now boasts an ultra-premium 200MP camera with Pro-Visual Engine so you can effortlessly take incredibly detailed pics.
- SCREENSHARE FOR STREAMLINED ASSISTANCE: Intrigued by something you see? Go Live with Google Gemini, then screenshare or point your camera at it for additional info or assistance on the fly.¹
- DO AND VIEW MORE, ALL AT ONCE: With an 8” screen that allows you to view up to three windows at once, Galaxy Z Fold7 is the ultimate device for seeing and doing more.²
- ALL THE POWER AND SPEED YOU NEED Smoothly run your day with the power and speed of Galaxy Z Fold7. With its customized Snapdragon 8 Elite processor for Galaxy, you can stream your favorite shows, edit photos, scroll social feeds and more with ease.³
OnePlus notes that its US pricing can change with market conditions, and the iPhone figure comes from a news report rather than Apple’s store. Check apple.com’s US store for the live price before deciding.
Quick Recap
Best Value
- This phone is unlocked and compatible with any carrier of choice on GSM and CDMA networks (e.g. AT&T, T-Mobile, Sprint, Verizon, US Cellular, Cricket, Metro, Tracfone, Mint Mobile, etc.).
- Please check with your carrier to verify compatibility.
- When you receive the phone, insert a SIM card from a compatible carrier. Then, turn it on, connect to Wi-Fi, and follow the on screen prompts to activate service.
- The device does not come with headphones or a SIM card. It does include a generic (Mfi certified) charger and charging cable.
- Tested for battery health and guaranteed to have a minimum battery capacity of 80%.
Which phone fits which buyer
- Choose the iPhone 18 Pro Max if you want iOS, the larger 6.9-inch display, or storage up to 2TB, and the higher starting price is acceptable.
- Choose the OnePlus 15 if you want Android with OxygenOS 16, a lower US starting price, the 165Hz gaming ceiling, or a listed 7,300mAh battery with 80W wired charging.
- If you need 512GB, the OnePlus 16GB/512GB is listed at $999.99 in US launch pricing. Compare that against the live iPhone price at the same capacity before deciding.
What these specifications cannot tell you
- Manufacturer specifications show listed capabilities. They do not measure everyday speed, battery endurance, gaming smoothness, or camera quality.
- Charging, camera, and pricing details vary by market. Keep the US and Canadian figures separate from international ones.
- The iPhone’s price comes from a secondary news report dated September 9, 2026, and both companies’ prices can change after publication.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
