iPhone 18 Duo vs iPhone 18 Pro Max
Specs, full price and monthly payments for both phones, side by side.
The short version
- At full price, the iPhone 18 Duo starts at $1,999 and the iPhone 18 Pro Max at $1,299, so the iPhone 18 Duo costs $700 more.
- On a carrier plan, the lowest tracked monthly payment is $37.50 for the iPhone 18 Duo (T-Mobile) and $36.08 for the iPhone 18 Pro Max (Verizon). Plan and bill-credit requirements apply.
- Both use the A20 Pro chip.
- The iPhone 18 Duo has a 7.6-inch display; the iPhone 18 Pro Max has a 6.9-inch display.
- Cameras: iPhone 18 Duo has 48MP Dual Fusion System; iPhone 18 Pro Max has Triple 48MP (Main, Ultra Wide, 5x Telephoto).
- iPhone 18 Pro Max has the longer battery rating: up to 45 hours of video versus 44.
| iPhone 18 Duo | iPhone 18 Pro Max | |
|---|---|---|
| Chip | A20 Pro | A20 Pro |
| Display | 7.6-inch | 6.9-inch |
| Cameras | 48MP Dual Fusion System | Triple 48MP (Main, Ultra Wide, 5x Telephoto) |
| Battery (video) | Up to 44 hours | Up to 45 hours |
| Base storage | 256GB | 256GB |
| Lowest full price | $1,999 | $1,299 |
| Lowest monthly | $37.50/mo (T-Mobile) | $36.08/mo (Verizon) |
Specs come from our tracking sheet; check Apple's official specifications before relying on them.
Deals for both phones
Pay in full upfront
One payment, no contract. The phone is yours right away.
| Model | Retailer | Full price | Max trade-in value | Terms | Source |
|---|---|---|---|---|---|
| iPhone 18 Pro Max | Apple Store | $1,299 | Up to $650 | No ContractAny Plan / Unlocked | View terms |
| iPhone 18 Duo | Apple Store | $1,999 | Up to $650 | No ContractAny Plan / Unlocked | View terms |
Pay monthly with a carrier
Little or nothing down, then monthly payments over the term.
| Model | Retailer / Carrier | Upfront | Monthly | Terms & conditions | Est. total | Source |
|---|---|---|---|---|---|---|
| iPhone 18 Duo | T-Mobile | $0 | $37.50per month | 24 MonthsPlan: Go5G Next$1100 Credit trade-in+ $35 activation fee | $935 | View terms |
| iPhone 18 Pro Max | Verizon | $0 | $36.08per month | 36 MonthsPlan: Unlimited UltimateUp to $1000 trade-in+ $35 activation fee | $1333.88 | View terms |
| iPhone 18 Pro Max | AT&T | $0 | $36.08per month | 36 MonthsPlan: Unlimited Premium PLUp to $1000 trade-in+ $35 activation fee | $1333.88 | View terms |
Prices shown were saved on November 4, 2026 and may have changed. See the live deals page and confirm terms with the retailer before you buy. Estimated total = upfront + monthly × term + activation fee; it excludes plan price, taxes and trade-in credits. Some “View terms” links are affiliate links; see our disclosure.
Frequently asked questions
Which is cheaper, the iPhone 18 Duo or the iPhone 18 Pro Max?
By lowest tracked full price, the iPhone 18 Pro Max is cheaper at $1,299. At full price, the iPhone 18 Duo starts at $1,999 and the iPhone 18 Pro Max at $1,299, so the iPhone 18 Duo costs $700 more. Prices were saved on November 4, 2026 and change often.
Which has better battery life?
Our sheet rates the iPhone 18 Pro Max for up to 45 hours of video versus 44 hours for the other.
Should I pay in full or monthly?
Paying in full gives you the phone with no contract and no bill credits. Monthly plans spread the cost over a term, often with credits tied to a plan, so the real cost depends on how long you stay. Compare both tables on this page, and see how we treat $0 offers on our deals page.