Between the iPhone 17 Air and MIX Fold 4, the iPhone 17 Air comes out ahead in weight and pixel density, while the MIX Fold 4 wins on wired charging and wireless charging. Overall, the iPhone 17 Air scores 60.3 and the MIX Fold 4 scores 71.4 on our Mars Score.
Which should you buy?
The MIX Fold 4 is the clear pick on raw spec strength, leading by 11.1 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the iPhone 17 Air if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are weight, pixel density, promised os updates.
Pick the MIX Fold 4 if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are wired charging, wireless charging, ram, among others.
Both ship with comparable refresh rate, 5g support, optical image stabilization, so those specs don't separate the two — focus on the differences below.
Bottom line: the MIX Fold 4 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Apple - iPhone 17 Air wins
- ▲Weight — 80.00 g less. 146 vs 226.
- ▲Pixel density — 14.43% more. 460 ppi vs 402 ppi.
- ▲Promised OS updates: 6 (vs 4).
Why Xiaomi - MIX Fold 4 wins
- ▲Wired charging — 235.00% more. 67 W vs 20 W.
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲RAM — 100.00% more. 16 GB vs 8 GB.
- ▲Battery capacity — 75.86% more. 5100 mAh vs 2900 mAh.
- ▲Front camera — 66.67% more. 20 MP vs 12 MP.
- ▲Screen size — 20.91% more. 7.98 " vs 6.6 ".
- ▲Main camera — 4.17% more. 50 MP vs 48 MP.
- ▲AnTuTu — 4.08% more. 2040000 vs 1960000.
Spec comparison
Design
| Spec | Apple - iPhone 17 Air | Xiaomi - MIX Fold 4 |
|---|---|---|
| Weight | 146 glead | 226 g |
| Thickness | 5.6 mmlead | 9.47 mm |
| Water resistanceⓘ | IP68 | IPX8lead |
| Form factor | bar | foldable_booklead |
Display
| Spec | Apple - iPhone 17 Air | Xiaomi - MIX Fold 4 |
|---|---|---|
| Screen sizeⓘ | 6.6 " | 7.98 "lead |
| Pixel densityⓘ | 460 ppilead | 402 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2200 nits | 3000 nitslead |
Performance
Cameras
| Spec | Apple - iPhone 17 Air | Xiaomi - MIX Fold 4 |
|---|---|---|
| Main cameraⓘ | 48 MP | 50 MPlead |
| Front camera | 12 MP | 20 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Apple - iPhone 17 Air | Xiaomi - MIX Fold 4 |
|---|---|---|
| Battery capacity | 2900 mAh | 5100 mAhlead |
| Wired chargingⓘ | 20 W | 67 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Apple - iPhone 17 Air | Xiaomi - MIX Fold 4 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Apple - iPhone 17 Air | Xiaomi - MIX Fold 4 |
|---|---|---|
| OS | iOSlead | Android |
| Promised OS updates | 6 yearslead | 4 years |
Frequently asked
Which has better battery, iPhone 17 Air or MIX Fold 4?+
MIX Fold 4 has 75.9% more battery — 2900 mAh vs 5100 mAh.
Which is lighter, iPhone 17 Air or MIX Fold 4?+
iPhone 17 Air is 80g lighter — 146g vs 226g.
Is iPhone 17 Air waterproof?+
iPhone 17 Air has an IP68 rating.
Does MIX Fold 4 support 5G?+
Yes, MIX Fold 4 supports 5G.
Which has more RAM, iPhone 17 Air or MIX Fold 4?+
MIX Fold 4 offers 16GB of RAM.
Which has a better camera, iPhone 17 Air or MIX Fold 4?+
MIX Fold 4 has a 50 MP main camera vs 48 MP.
Spec-level deep dives
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