PhoneLifespan

ROG Phone 9 vs Open

vs

Winner

Asus ROG Phone 9

Lifespan decides this one: the ROG Phone 9 is supported until Nov 2029 at $24.35 per month of safe use, while the Open runs out in Oct 2028 ($32.13/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: ROG Phone 9 58 · Open 57 — methodology

The lifespan decider

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

Asus ROG Phone 9 $999
Safe to buy$24.35/mo
2024◆ Buy-by Nov 20272029
OnePlus Open $900
Buy with care$32.13/mo
2023◆ Buy-by Oct 20262028

Category by category

Display
ROG Phone 9 60Open 90

The Open's screen is the better one — 7.82-inch 2k ltpo3 fluid amoled inner foldable (2440×2268, 426 ppi) + 6.31-inch 2k amoled cover (2484×1116, 431 ppi), both 120hz, up to 2800 nits peak.

Performance
ROG Phone 9 98Open 85

The ROG Phone 9's Qualcomm Snapdragon 8 Elite is simply the faster chip.

Camera
ROG Phone 9 67Open 79

The Open has the stronger camera system (3 real rear lenses vs 2).

Battery
ROG Phone 9 96Open 76

5,800mAh vs 4,805mAh — the ROG Phone 9 lasts longer between charges.

Software longevity
ROG Phone 9 49Open 33

The ROG Phone 9 is supported until Nov 2029 — 13 months longer than the Open.

Value
ROG Phone 9 58Open 57

Pound for pound, these two are equally good deals.

Full spec table
SpecROG Phone 9Open
Price (street)$999$900
Display6.78-inch LTPO AMOLED, 1080x2400, 185Hz7.82-inch 2K LTPO3 Fluid AMOLED inner foldable (2440×2268, 426 ppi) + 6.31-inch 2K AMOLED cover (2484×1116, 431 ppi), both 120Hz, up to 2800 nits peak
ChipsetQualcomm Snapdragon 8 EliteSnapdragon 8 Gen 2
RAM12GB/16GB16GB
Storage256GB/512GB512GB
Battery5,800 mAh4,805 mAh
Charging65W wired, 15W wireless67W SUPERVOOC wired, no wireless
Rear cameras50MP main, 13MP ultra-wide, 5MP macro48MP main, 48MP ultra-wide, 64MP periscope telephoto 3x
Dimensions163.8 × 76.8 × 8.9 mmUnfolded 153.4 × 143.1 × 5.8 mm; Folded 153.4 × 73.3 × 11.7 mm
Weight227 g239 g
Water resistanceIP68IPX4
Supported untilNov 2029Oct 2028
ROG Phone 9 full verdict →Open full verdict →Longevity master board →

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