π₯ Who This Article Is For
This comparison is written for someone who:
- Is considering buying either phone now, when both are available at reduced prices
- Wants to understand real tradeoffs, not just spec sheet numbers
- Understands that both phones are 2023-2024 releases and newer flagships now exist
If you want the absolute latest technology, the iPhone 16 Pro and Galaxy S25 Ultra are the current generation. This guide focuses on the 15 Pro and S24 Ultra specifically because they represent significant value at their current price points.
π What We Actually Did to Research This
We did not conduct lab tests. We do not have testing equipment. What we did:
- Compiled benchmark data from GSMArena (gsmarena.com), which publishes detailed lab measurements
- Referenced DXOMARK (dxomark.com) camera scoring methodology and published scores
- Referenced Tom’s Guide battery testing, which uses a standardized 5G web browsing loop
- Read user reviews across Reddit’s r/iPhone and r/GalaxyS24 communities for real-world feedback
- Checked current pricing across Amazon, AliExpress, and carrier websites as of publication
We are synthesizing publicly available information. We are not a laboratory. The value we provide is organization and honest interpretation, not original testing.
π± The Honest State of Both Phones in 2024-2025
Before the specs, here is context that matters:
iPhone 15 Pro will receive iOS updates until approximately 2028-2029 based on Apple’s historical support pattern. It runs the A17 Pro chip, which remains genuinely fast for current tasks.
Galaxy S24 Ultra is covered by Samsung’s 7-year update commitment, meaning security and OS updates through approximately 2031. This is an unusually strong commitment for Android and a meaningful advantage for long-term ownership.
Both phones are aging flagships. If you are paying full original retail price for either, stop and check current pricing first. Both have dropped significantly.
π Specifications and Benchmarks
| Feature | iPhone 15 Pro | Galaxy S24 Ultra | Source |
|---|---|---|---|
| Display Size | 6.1 inches | 6.8 inches | Manufacturer |
| Peak Brightness | 2,058 nits | 2,646 nits | GSMArena Lab |
| Refresh Rate | 1-120Hz adaptive | 1-120Hz adaptive | Manufacturer |
| Processor | Apple A17 Pro | Snapdragon 8 Gen 3 | Manufacturer |
| RAM | 8GB | 12GB | Manufacturer |
| Main Camera | 48MP | 200MP | Manufacturer |
| Periscope Zoom | 3x optical | 5x optical | Manufacturer |
| Battery Capacity | 3,274 mAh | 5,000 mAh | Manufacturer |
| Battery Endurance | 10h 53m | 14h 9m | Tom’s Guide |
| DXOMARK Score | 154 | 153 | DXOMARK |
| Build | Titanium Grade 5 | Titanium Grade 2 | Manufacturer |
| Starting Price (Current) | Check current price β varies daily | Retailers | |
Why we didn’t hardcode prices: Prices change weekly on older flagships. Any number we print here will be wrong within days. Check current pricing using the links below.
We earn a commission if you purchase through these links.
βοΈ Display: What the Numbers Actually Mean
The S24 Ultra measures 588 more nits at peak brightness. In practice, this means it is more readable in direct sunlight. This is a real, measurable advantage.
The Gorilla Armor anti-reflective coating on the S24 Ultra is also genuinely useful. Reflections are a bigger obstacle to outdoor readability than raw brightness in many conditions.
The iPhone 15 Pro’s smaller 6.1-inch screen is not a weakness for everyone. If you use your phone one-handed regularly, the size difference between these two devices is substantial. The S24 Ultra at 6.8 inches is a large phone that requires intentional two-handed use for many tasks.
What we cannot tell you: Which display looks better to your eyes. Color preference is subjective. If possible, see both in person before deciding.
π Battery Life: The Clearest Difference
This is where the data tells the most consistent story. The S24 Ultra lasts approximately 3 hours and 16 minutes longer in Tom’s Guide’s standardized test. That is not a marginal difference. Across multiple testing methodologies, the S24 Ultra consistently outperforms the iPhone 15 Pro on endurance.
The reasons are straightforward:
- The S24 Ultra carries a 53% larger battery by capacity
- Samsung’s display scaling and power management are efficient at the S24 Ultra’s larger size
The honest counterpoint: The iPhone 15 Pro charges from 0-50% in approximately 30 minutes with a fast charger. If you have reliable access to charging throughout the day, the battery gap matters less. If you frequently go long periods without charging access, the S24 Ultra’s advantage is meaningful.
πΈ Camera: Why the Scores Are Almost Identical
Both phones score within one point of each other on DXOMARK (154 vs 153). This is not a coincidence or a rounding error. These are genuinely comparable imaging systems that prioritize different things.
π iPhone 15 Pro Does Better At:
- Video recording, particularly ProRes
- Skin tone rendering in portraits
- Video stabilization
- Consistency across conditions
π€ Galaxy S24 Ultra Does Better At:
- Zoom photography (5x periscope)
- 100x Space Zoom (usable to ~30x)
- AI editing tools built-in
- 200MP cropping flexibility
What Neither Does Well: Both phones struggle in extremely low light compared to their marketing suggests. Both use computational photography to enhance night shots in ways that can look artificial. Neither fully replaces a dedicated camera for professional work.
π² Software: The Factor Most Comparisons Underweight
This matters more than almost any hardware specification for long-term satisfaction.
- iOS 17 (iPhone 15 Pro): Simultaneous updates with all iPhones; support likely through 2028-2029. Tight integration with Apple ecosystem. Less customizable by design.
- One UI 6 / Android 14 (Galaxy S24 Ultra): 7-year update commitment (to ~2031). Significantly more customizable. Samsung DeX desktop mode. Some users find Samsung’s software additions intrusive.
The honest framing: If you already use Apple products extensively, switching to Android involves real friction. If you use Windows and Google services, the S24 Ultra integrates more naturally. Ecosystem fit matters more than most spec comparisons acknowledge.
π‘οΈ Build Quality: Grade 5 vs Grade 2 Titanium
Both phones use titanium frames, but the grades differ:
- Grade 5 Titanium (iPhone 15 Pro): Alloy with aluminum and vanadium. Stronger and harder. Used in aerospace.
- Grade 2 Titanium (Galaxy S24 Ultra): Commercially pure. Lighter, more corrosion resistant, but less hard.
In practical drop and scratch resistance, Grade 5 is more durable. Whether this matters depends on whether you use a case. Most people do, which makes frame material largely irrelevant. Both are IP68 rated.
β Who Should Buy Each Phone
Consider iPhone 15 Pro If:
- You use Mac, iPad, Apple Watch
- You shoot video and want ProRes
- Prefer smaller, lighter phone
- Value software simplicity
- Value App Store quality
Consider Galaxy S24 Ultra If:
- You use Windows/Google services
- Shoot photos at distance often
- Want maximum battery endurance
- Want built-in S Pen
- Want 7-year software support
- Prefer deep customization
Consider Neither If: Budget is a primary concern (mid-range phones offer 85% of the experience). Or if you want the absolute latest technology (iPhone 16 Pro / S25 Ultra).
π° Current Pricing and Where to Buy
Prices fluctuate frequently. We recommend checking:
- Amazon for flash discounts
- AliExpress for competitive pricing (verify seller ratings)
- Best Buy for open-box certified refurbished
- Your carrier for trade-in deals
- Swappa or Back Market for certified used units
β οΈ What We Are Uncertain About
- We have not personally tested either phone in controlled conditions
- Real-world battery life varies significantly based on usage and signal
- Camera quality is partially subjective
- Prices change faster than we can update this article
π Summary
Neither phone is objectively better. The Galaxy S24 Ultra wins on battery life, zoom photography, display brightness, software longevity, and screen size. The iPhone 15 Pro wins on video recording, build material quality, size for one-handed use, and Apple ecosystem integration.
The right choice depends on what you already own, how you use your phone, and what you are willing to pay. We have tried to give you accurate information to make that decision yourself.