PhoneLifespan

iPhone 17 Pro Max vs 15 Ultra

vs

It depends

Too close to call outright

These two are within 4 points overall — it genuinely depends on price on the day. The iPhone 17 Pro Max edges both longevity and performance, so prefer it when prices are close.

Value Score: iPhone 17 Pro Max 69 · 15 Ultra 65 methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Apple iPhone 17 Pro Max $1199
Safe to buy$15.94/mo
2025◆ Buy-by Sep 20302032
Xiaomi 15 Ultra $1350
Safe to buy$30.26/mo
2025◆ Buy-by Mar 20282030

Category by category

Display
iPhone 17 Pro Max 9015 Ultra 100

The 15 Ultra's screen is the better one — 6.73-inch 2k (1440×3200) ltpo amoled, 1–120hz, up to 3200 nits peak.

Performance
iPhone 17 Pro Max 10015 Ultra 98

Performance is a wash — same chip tier.

Camera
iPhone 17 Pro Max 7415 Ultra 96

The 15 Ultra has the stronger camera system (4 real rear lenses vs 3).

Battery
iPhone 17 Pro Max 8215 Ultra 88

5,410mAh vs 5,088mAh — the 15 Ultra lasts longer between charges.

Software longevity
iPhone 17 Pro Max 9015 Ultra 53

The iPhone 17 Pro Max is supported until Sep 2032 — 31 months longer than the 15 Ultra.

Value
iPhone 17 Pro Max 6915 Ultra 65

Overall value goes to the iPhone 17 Pro Max at $15.94 per month of safe use.

Full spec table
SpeciPhone 17 Pro Max15 Ultra
Price (street)$1199$1350
Display6.9-inch Super Retina XDR OLED, ProMotion 1–120Hz, up to 3000 nits peak6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
ChipsetApple A19 ProQualcomm Snapdragon 8 Elite (3nm)
RAM12GB16GB
Storage256GB/512GB/1TB/2TB512GB/1TB
Battery5,088 mAh5,410 mAh
ChargingWired fast charge — 50% in ~20 min with a 40W+ adapter; MagSafe wireless up to 25W (Qi2.2)90W wired, 80W wireless
Rear cameras48MP main, 48MP ultra-wide, 48MP telephoto 4x50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions163.4 × 78 × 8.75 mm161.3 × 75.3 × 9.35 mm
Weight233 g226 g
Water resistanceIP68IP68
Supported untilSep 2032Mar 2030

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.