Looking for an honest Apple iPhone 17 Air vs Samsung Galaxy S21 Ultra 5G comparison in 2026? We scored both smartphones on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. Both products score nearly identically (58/100 vs 56/100) — this is a genuine toss-up that hinges on which specs matter most for your use case. The widest gap is in performance, where the Apple iPhone 17 Air pulls noticeably ahead. On price the Samsung Galaxy S21 Ultra 5G undercuts the Apple iPhone 17 Air by 248% ($258.69 vs $899), which materially changes the value calculus for budget-conscious buyers.

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Apple iPhone 17 Air and Samsung Galaxy S21 Ultra 5G are closely matched smartphones devices with nearly identical overall scores (58 vs 56). The best choice depends on which specific features matter most to you.
Apple
$899
Scores are relative within the smartphonescategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | Apple iPhone 17 Air | Samsung Galaxy S21 Ultra 5G |
|---|---|---|
| Display | 6.6" | 6.8"✓ |
| Display Type | OLED | Dynamic AMOLED 2X |
| Resolution | — | 3200 x 1440 pixels |
| Refresh Rate | 120Hz | 120Hz |
| Brightness | — | 1750nits |
| HDR | — | HDR10+ |
| Protection | — | Gorilla Glass Victus |
| Chipset | Apple A19 | Snapdragon 888 |
| CPU | — | Octa-core 2.9 GHz |
| GPU | — | Mali-G78 MP14 |
| RAM | 8GB | 12GB✓ |
| Storage | 128GB | 128GB |
| Storage Options | — | 128GB, 256GB, 512GB |
| Main Camera | 48MP | 108MP✓ |
| Aperture | — | f/1.8 |
| OIS | — | Yes |
| Zoom | — | 10x optical |
| Video | — | 8K@24fps, 4K@60fps |
| Front Camera | 24MP | 40MP✓ |
| Battery | 3400mAh | 5000mAh✓ |
| Charging | 25W | 25W |
| Wireless Charging | — | 15W |
| OS | iOS 19 | Android 11, upgradable to Android 13 |
| Wi-Fi | — | Wi-Fi 6 (802.11ax) |
| Bluetooth | — | Bluetooth 5.0 |
| NFC | Yes | Yes |
| USB | — | USB Type-C 3.2 |
| Water Resistance | IP68 | IP68 |
| Biometrics | — | Under-display fingerprint |
| Dimensions | — | 165.1 x 75.6 x 8.9 mm |
| Weight | 145g✓ | 228g |
| Colors | — | Phantom Black, Phantom Silver, Phantom Navy, Phantom Brown |
| Price | 899$ | 258.69$✓ |
Buy Apple iPhone 17 Air if…
The Apple iPhone 17 Air is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Buy Samsung Galaxy S21 Ultra 5G if…
Choose the Samsung Galaxy S21 Ultra 5G if budget is your top priority — it offers competitive specs at a lower price point.
Apple iPhone 17 Air and Samsung Galaxy S21 Ultra 5G are closely matched smartphones devices with nearly identical overall scores (58 vs 56). The best choice depends on which specific features matter most to you.
Both products score similarly — it depends on your priorities.
Samsung Galaxy S21 Ultra 5G is cheaper at $258.69 vs $899 for the Apple iPhone 17 Air.
The Apple iPhone 17 Air is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Choose the Samsung Galaxy S21 Ultra 5G if budget is your top priority — it offers competitive specs at a lower price point.
Samsung Galaxy S21 Ultra 5G has a larger battery (5,000mAh vs 3,400mAh for the Apple iPhone 17 Air), which generally means longer use between charges.
Samsung Galaxy S21 Ultra 5G has the larger display (6.8" vs 6.6").
Samsung Galaxy S21 Ultra 5G has a higher-resolution main camera (108MP vs 48MP). Note that megapixels are one factor — sensor quality and processing also matter.
Apple iPhone 17 Air is lighter at 145g vs 228g.
Samsung Galaxy S21 Ultra 5G has more RAM (12GB vs 8GB), which helps with multitasking.
Reviewed by VersusMatrix Editorial Team
Last updated: May 21, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.