iPhone 15 vs iPhone 17
The iPhone 15 and the iPhone 17 share a badge but not a lineup, and that difference shows up in the spec sheet. The scorecard favors the iPhone 17, which leads in 5 of 5 areas. Its strongest showing is in the display category. Here’s where the iPhone 15 and the iPhone 17 part ways, and where they don’t.
At a glance
- Display iPhone 17 wins
- Performance iPhone 17 wins
- Memory & Storage iPhone 17 wins
- Camera iPhone 17 wins
- Battery & Charging iPhone 17 wins
- Price Tie
- Display2.6
- Memory & Storage1.8
- Camera1.7
- Battery & Charging1.9
- Display6.6
- Memory & Storage3.6
- Camera3.8
- Battery & Charging4.6
Spec scores (0 to 10) are calculated from manufacturer specs against other models in the same class. See how the formula works. They are not reviews or user ratings.
Key Differences
-
The iPhone 17 has a 120 Hz display instead of 60 Hz
Big gap, real consequences. The iPhone 17’s 120 Hz versus the iPhone 15’s 60 Hz changes how the two compare in daily use. A higher refresh rate makes scrolling, animations and games look smoother. Once you’re used to it, a lower-rate screen can feel sluggish by comparison.
-
The iPhone 17 has 10 h more rated video playback
The iPhone 15 is clearly behind on rated video playback (20 h against 30 h), and that’s one of its biggest weak spots in this matchup. Rated video playback is the manufacturer’s own endurance figure, so it reflects efficiency as well as battery size.
-
The iPhone 17 has 256 GB of base storage instead of 128 GB
On this line of the spec sheet, the iPhone 17 is in a different league: 256 GB, next to 128 GB for the iPhone 15. If you shoot a lot of video or keep music and maps offline, base storage is one of the specs you’ll feel most over the years.
-
The iPhone 17 has 50% higher peak brightness
For peak brightness, the iPhone 17 leads by a wide margin: 3,000 nits versus 2,000 nits. Peak brightness decides how readable the screen stays in direct sunlight and how punchy HDR content looks.
-
The iPhone 17 has a sharper 48 MP ultra-wide
This is a headline difference. With 48 MP to the iPhone 15’s 12 MP, the iPhone 17 has a lead that’s easy to see on paper and in practice. Ultra-wide cameras often lag behind the main one, so the iPhone 17’s higher resolution helps narrow that gap.
-
The iPhone 17 has faster 25 W wireless charging
Put simply, the iPhone 17 is far ahead here: 25 W compared with 15 W. Wireless charging is usually slower than a cable, so this edge matters mainly to people who value the convenience.
Design & Size
- iPhone 15 5.81 in × 2.82 in × 0.31 in
- iPhone 17 5.89 in × 2.81 in × 0.31 in
In overall size, the iPhone 15 and the iPhone 17 are close enough that you’d struggle to tell them apart by dimensions alone. Both land at nearly the same weight, so this isn’t a deciding factor.
Design & Build
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Height | 5.81 in | 5.89 in |
| Width | 2.82 in | 2.81 in |
| Thickness | 0.31 in | 0.31 in |
| Weight | 6.03 oz | 6.24 oz |
| Water & dust rating | IP68 | IP68 |
| Frame | Aluminum | Aluminum |
Display
iPhone 17 leads
This section belongs to the iPhone 17. In display, it leads the iPhone 15 by a margin that’s hard to ignore. The iPhone 17 comes with a 120 Hz display instead of 60 Hz. Smoother motion is one of the most visible display upgrades, and adaptive high-refresh panels can slow down on static content to save power. The takeaway: on display, the iPhone 17 is the stronger phone.
Refresh rate
iPhone 15: 60 Hz iPhone 17: 120 Hz You notice refresh rate every time you scroll a feed or a web page, which is why the iPhone 17 feels more fluid in everyday use.
Peak brightness
iPhone 15: 2,000 nits iPhone 17: 3,000 nits If you use your phone outdoors a lot, the iPhone 17’s brighter panel is the one that holds up better at midday.
Performance
iPhone 17 leads
The iPhone 15 comes close on performance, but the iPhone 17 does just enough to lead. On its side, the iPhone 17 has a newer 3 nm chip process. A finer process node generally lets a chip do the same work with less power, which can mean cooler running and better battery life. Weighing only performance, the iPhone 17 comes out ahead.
Process node
iPhone 15: 4 nm iPhone 17: 3 nm The iPhone 17’s chip is built on a more advanced process. That usually points to efficiency gains, though chip design matters just as much.
Memory & Storage
iPhone 17 leads
The iPhone 15 is outclassed on memory & storage; the iPhone 17 leads by a clear margin. The iPhone 17 brings 256 GB of base storage instead of 128 GB. Base storage is what you get without paying extra. Photos, videos and apps add up quickly, so more space at the entry price is real value. Net result: the iPhone 17 leads this part of the comparison.
Base storage
iPhone 15: 128 GB iPhone 17: 256 GB The iPhone 17 starts with more room, which means fewer “storage full” warnings and less time deleting old videos.
Camera
iPhone 17 leads
This is one of the iPhone 17’s strongest areas. On camera, the iPhone 15 falls well short. The iPhone 17 has the edge with a sharper 48 MP ultra-wide. If you rarely switch to the wide view, this won’t matter much; if you use it often, it will. If this section decides it for you, choose the iPhone 17.
Ultra-wide camera
iPhone 15: 12 MP iPhone 17: 48 MP A sharper ultra-wide keeps more detail at the edges of landscape, architecture and group shots.
Front camera
iPhone 15: 12 MP iPhone 17: 18 MP A sharper selfie camera helps with video calls, vlogs and group selfies.
Battery & Charging
iPhone 17 leads
The battery & charging comparison is one-sided. The iPhone 17 leads where it counts. The iPhone 17 steps ahead thanks to 10 h more rated video playback. Lab ratings rarely match real life exactly, but comparing them between two phones is still a useful endurance hint. If battery & charging is your priority, the iPhone 17 is the phone to pick.
Rated video playback
iPhone 15: 20 h iPhone 17: 30 h More rated playback suggests the iPhone 17 lasts longer on a long flight or an evening of streaming.
Wireless charging
iPhone 15: 15 W iPhone 17: 25 W Faster wireless charging makes a pad or stand more practical as your main way to top up.
Software & Updates
Here the spec sheet speaks in model names and types. Compare the iPhone 15 and the iPhone 17 row by row in the table below.
Full Specifications
Display
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Screen size | 6.1 in | 6.3 in |
| Panel type | OLED (Super Retina XDR) | OLED, ProMotion 120 Hz (Super Retina XDR) |
| Resolution | 2556 x 1179 | 2622 x 1206 |
| Pixel density | 460 ppi | 460 ppi |
| Refresh rate | 60 Hz | 120 Hz (winner) |
| Peak brightness | 2,000 nits | 3,000 nits (winner) |
| Always-on display | No | Yes (winner) |
Performance
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Chipset | A16 Bionic | A19 |
| CPU cores | 6 | 6 |
| Process node | 4 nm | 3 nm (winner) |
Memory & Storage
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Base storage | 128 GB | 256 GB (winner) |
| Max storage | 512 GB | 512 GB |
| microSD slot | No | No |
Camera
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Main camera | 48 MP | 48 MP |
| Ultra-wide camera | 12 MP | 48 MP (winner) |
| Rear cameras | 2 | 2 |
| Front camera | 12 MP | 18 MP (winner) |
| Max video | 4K60 Dolby Vision | 4K60 Dolby Vision |
Battery & Charging
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Rated video playbackManufacturer rating | 20 h | 30 h (winner) |
| Wireless charging | 15 W | 25 W (winner) |
| Port | USB-C (USB 2) | USB-C (USB 2) |
Software & Updates
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| OS at launch | iOS 17 | iOS 26 |
Design & Build
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Height | 5.81 in | 5.89 in |
| Width | 2.82 in | 2.81 in |
| Thickness | 0.31 in | 0.31 in |
| Weight | 6.03 oz | 6.24 oz |
| Water & dust rating | IP68 | IP68 |
| Frame | Aluminum | Aluminum |
Price
| Spec | iPhone 15 | iPhone 17 |
|---|---|---|
| Launch price | $799 | $799 |
“N/A” means the manufacturer does not specify the value or we could not confirm it. Figures marked “manufacturer rating” are the maker’s own claims, not our measurements.
Price & Value
At launch, the iPhone 15 and the iPhone 17 cost the same.
Prices shown are US launch prices as of September 2025. Retail prices change often, so it’s worth checking current offers.
Which One Should You Buy?
Choose the iPhone 15 if…
- you rarely use the areas where the newer model improves
Choose the iPhone 17 if…
- you want smoother scrolling (120 Hz vs 60 Hz)
- you want the longer rated endurance (30 h vs 20 h)
- you want more storage without paying for an upgrade (256 GB vs 128 GB)
- you want the screen that stays readable on sunny days (3,000 nits vs 2,000 nits)
- you want the newer generation
Also Compared
Frequently Asked Questions
Should I buy the iPhone 15 or the iPhone 17?
On the specs compared here, the iPhone 17 makes more sense for most buyers; the iPhone 15 doesn’t win a single measurable area.
Which has the better camera, the iPhone 15 or the iPhone 17?
The iPhone 17 has the edge for photography, offering a sharper 48 MP ultra-wide and a sharper 18 MP selfie camera.
Which has better battery life, the iPhone 15 or the iPhone 17?
The iPhone 17 does better here. It lists 30 h for rated video playback, while the iPhone 15 lists 20 h.
Is the iPhone 17 worth it over the iPhone 15?
It’s one of the more worthwhile generational jumps: the iPhone 17 offers a 120 Hz display instead of 60 Hz, 10 h more rated video playback and 256 GB of base storage instead of 128 GB compared with the iPhone 15.
Is the iPhone 15 bigger than the iPhone 17?
Neither by much. The iPhone 15 and the iPhone 17 have nearly identical dimensions.
Does the iPhone 15 perform better than the iPhone 17?
Going by the specs, the iPhone 17 comes out ahead: it offers a newer 3 nm chip process.
Is the iPhone 15’s display better than the iPhone 17’s?
The iPhone 17 has the edge here, offering a 120 Hz display instead of 60 Hz and 50% higher peak brightness.
Which weighs less, the iPhone 15 or the iPhone 17?
Their weights are practically identical, so neither has a real advantage.
Executive Summary
The iPhone 15 and the iPhone 17 share a family name, so let me focus on what doesn’t match. I keep coming back to one thing: the iPhone 17 gets a 120 Hz display instead of 60 Hz. On top of that, the iPhone 17 adds 10 h more rated video playback.
If you’d rather have strength in the things a spec sheet can’t capture, go with the iPhone 15. If display is what you’d miss, go with the iPhone 17.
My pick: the iPhone 17.
Personal opinion based on the data above. Your priorities may differ.