Apple’s iPhone 13 Pro Max launched in September 2021 with a 120Hz ProMotion display, a big jump in battery life, and cameras good enough that a lot of people never felt the need to upgrade.
Since then, Apple has put out the 14, 15, 16, and 17 Pro Max, and in September 2026, the 18 Pro Max joined the lineup.
So, is it finally time to let go of your iPhone 13 Pro Max?
In this article, I’ll break down what has changed across five generations and whether the 18 Pro Max is worth the upgrade or your 13 Pro Max still has some life left.
iPhone 18 Pro Max vs iPhone 13 Pro Max Specs
| Features | iPhone 18 Pro Max | iPhone 13 Pro Max |
|---|---|---|
| Display | 6.9 inches, 2868 x 1320 pixels, Super Retina XDR OLED, ProMotion 120 Hz, Ceramic Shield 2 front | 6.7 inches, 2778 x 1284 pixels, Super Retina XDR OLED, ProMotion 120 Hz, Ceramic Shield front |
| Weight | 249g | 240g |
| Processor & RAM | A20 Pro (2nm) + 12 GB | A15 Bionic (5nm) + 6GB |
| Storage Capacity | 256GB, 512GB, 1TB, 2TB | 128GB, 256GB, 512GB, 1TB |
| Main Camera | 48MP Main + 48MP Ultra-Wide + 48MP Telephoto (5x Optical Zoom) | 12MP Main + 12MP Ultra-Wide + 12MP Telephoto (3x Optical Zoom) |
| Front Camera | 18 megapixels, f/1.9 aperture, autofocus with Focus Pixels, Center Stage ultra-wide framing, 4K video at 60 fps | 12 megapixels, f/2.2 aperture, fixed focus, 4K video at 60 fps |
| Battery Capacity | 5,391 mAh (5,567 mAh on eSIM-only models) | 4,352 mAh |
| Released Date | September 18, 2026 | September 24, 2021 |
iPhone 18 Pro Max vs. iPhone 13 Pro Max: Display and build
iPhone 18 Pro Max vs. iPhone 13 Pro Max: Display and buildBoth phones use a Super Retina XDR OLED panel with ProMotion, so the smooth scrolling you’ve had since 2021 is still a big deal five years later.
As regards screen size, the 13 Pro Max ships with a 6.7-inch display, while the 18 Pro Max goes up a little to 6.9 inches. Nothing too significant.
Now to the little cutout on the iPhone 13 Pro Max screen. The notch takes up screen space and can sometimes be annoying. The iPhone 18 Pro Max upgrades to the Dynamic Island, a pill-shaped cutout that animates and expands to show alerts, calls, and live activities.
The build got a rework, from the 13 Pro Max’s stainless steel frame to an aluminum unibody on the 18 Pro Max, which handles heat better and keeps the bigger phone only 9g heavier. Finally, there’s Ceramic Shield 2 on the front and Ceramic Shield on the back for more sturdiness.
iPhone 18 Pro vs. iPhone 13 Pro Performance: A20 Pro Chip vs. A15 Bionic Chip
The iPhone 13 Pro Max is powered by the 5nm A15 Bionic chip, with a 6-core CPU, 5-core GPU, 6GB of RAM, and a 16-core Neural Engine. It handles everyday tasks and most games without trouble.
The 18 Pro Max, on the other hand, runs on the A20 Pro, built on a 2nm process. It keeps the 6-core CPU but steps up to a 7-core GPU, a dual 16-core Neural Engine (32 cores in total), and 12GB of RAM.
What’s a top-class chip without proper cooling? The A20 Pro is paired with a vapor chamber that has three times the surface area of the one in the 17 Pro. Together with new chip packaging and thermal materials, Apple says it delivers up to 40% more sustained performance than the 17 Pro. In simple terms, the phone holds its speed longer before throttling during intense tasks.
If you stick to everyday tasks, you might not feel the chip difference. If you game heavily, edit video, or want a phone that stays fast under heavy loads, the 18 Pro Max is worth the upgrade.
iPhone 18 Pro Max vs. iPhone 13 Pro Max: Software and AI
Five generations on, the 13 Pro Max is still current. It launched on iOS 15 and now runs iOS 27.
The 18 Pro Max ships with iOS 27 out of the box. Apple doesn’t publish how long it will keep updating a given iPhone, but the track record is strong. The iPhone 11 launched on iOS 13 in 2019 and still runs iOS 27 today. Whether the 13 Pro Max makes the next cut isn’t confirmed.
Updated iOS is great, but the main decider is Apple Intelligence, which needs an iPhone 15 Pro or newer. The 13 Pro Max can’t run it or the Siri AI built on it.
Siri AI draws on your messages, emails, and photos to find what you need, understands what’s on your screen, and takes actions across apps. A camera mode also extends Visual Intelligence to objects around you. Apple Intelligence adds tools like Extend and an upgraded Clean Up in Photos, Notify Me alerts in Safari, and Describe a Shortcut.
If AI isn’t a priority, the 13 Pro Max still runs the latest iOS well. If you want Siri AI, the 18 Pro Max is the clearest reason to upgrade.
iPhone 18 Pro Max vs. iPhone 13 Pro Max: Camera showdown
If you rely on your iPhone for photos, this is where the five-year gap is easiest to see.
The 13 Pro Max has three 12MP rear cameras: a Wide (ƒ/1.5), an Ultra Wide (ƒ/1.8), and a Telephoto with 3x optical zoom. The 18 Pro Max upgrades all three to 48MP and stretches the telephoto to 4x, with an 8x optical-quality zoom. That means more detail to crop into and more reach before you’re stuck with digital zoom.
The main takeaway from the iPhone 18 Pro Max’s main camera is the inclusion of a variable aperture. It gives you real control over the amount of light and depth each shot gets, and it’s the very first of its kind on an iPhone.
For the front camera, the 18 Pro Max has an 18MP Center Stage camera, a massive upgrade from the 12MP on the 13 Pro Max. The upgrade includes a square sensor that lets you switch between portrait and landscape without rotating the phone, which is ideal for group selfies and video calls.
iPhone 18 Pro Max vs. iPhone 13 Pro Max: Video comparison
Video is where the gap gets even wider. The 13 Pro Max records 4K Dolby Vision at up to 60 fps, while the 18 Pro Max pushes that to 120 fps, so you can shoot smooth 4K slow motion straight from the main camera. Cinematic mode also gets a big jump, from 1080p at 30 fps on the 13 Pro Max to 4K Dolby Vision at 60 fps on the 18 Pro Max.
If you’re into serious video work, the difference is even clearer. The 13 Pro Max tops out at ProRes 4K at 30 fps (and only 1080p on the 128GB model). The 18 Pro Max records ProRes up to 4K at 120 fps with external recording and adds ProRes RAW, Apple Log 2, and genlock support, tools you’d normally find on professional cameras.
For everyday shooters, two features stand out. Action mode keeps footage steady while you’re running or moving, up to 2.8K at 60 fps, and Dual Capture lets you record from the front and rear cameras at the same time, which is handy for reactions and vlogs. Four studio-quality mics, wind noise reduction, and Audio Mix also mean your videos sound as good as they look. The 13 Pro Max has none of these.
If you mostly shoot casually in good light, the 13 Pro Max may still be enough. If you zoom a lot, take group selfies, shoot a lot of video, or want more creative control, the 18 Pro Max is a necessary upgrade.
iPhone 18 Pro Max vs. iPhone 13 Pro Max: Battery life and charging
The 13 Pro Max launched with a 4,352 mAh battery and was praised for its longevity in 2021. Apple rates it for up to 28 hours of video playback.
The 18 Pro Max goes bigger, with a 5,391 mAh battery (5,567 mAh on eSIM-only models), and Apple rates it for up to 45 hours of video playback. Up to 1,215 mAh more is a big deal if you’d ask me.
As for charging, the 13 Pro Max still uses Lightning and reaches 50% in around 30 minutes with a 20W adapter. The 18 Pro Max uses USB-C and gets there in around 15 minutes with a 60W or higher adapter. For wireless, the 13 Pro Max supports 15W on MagSafe and 7.5W on standard Qi, while the 18 Pro Max maxes out at 25W on both MagSafe and Qi2.
If you’re a heavy user, the 18 Pro Max’s bigger battery and faster charging mean less time plugged in and more time on your phone.
List of features missing in the iPhone 13 Pro Max
Software and AI
- Apple Intelligence and Siri AI
Display
- Dynamic Island
- Always-On Display
- Anti-reflective coating
Camera
- Variable aperture on the main camera (ƒ/1.48 to ƒ/4.0)
- 48MP Ultra Wide and 48MP Telephoto (the 13 Pro Max is 12MP across all three)
- 4x telephoto with 8x optical-quality zoom (the 13 Pro Max has 3x, with a 6x range)
- 18MP Center Stage front camera with a square sensor, which lets you switch between portrait and landscape without turning the phone
Build
- Ceramic Shield 2 on the front
- Ceramic Shield on the back
- USB-C port
Is it finally time to let go of your iPhone 13 Pro Max?
After five generations, the 18 Pro Max is a big step up. Whether you need it comes down to how you use your phone.
Upgrade if:
- Your battery barely gets you through the day, or your battery health has dropped below 80%.
- You want the complete Siri AI experience and the Apple Intelligence tools the 13 Pro Max can’t run.
- You want more from your camera, whether that’s sharper zoom, better group selfies, or 4K slow-motion video.
- You’re tired of waiting to charge and want USB-C with 50% in around 15 minutes.
- You’re running out of storage and want room to grow (up to 2TB).
Hold on to it if:
- You mostly scroll, message, and stream.
- You’re happy with your photos in good light and rarely shoot video.
- Your battery still lasts the day and your phone runs smoothly.
- AI features aren’t a priority for you.
Where to sell your iPhone 13 Pro Max for the most money
The Whiz Cells is a direct iPhone buyback platform that’s paid out over $49 million since 2012. In a 2026 buyback comparison study, The Whiz Cells paid 47% more on average than competing platforms, so more of your 13 Pro Max’s value goes toward your 18 Pro Max.
Getting paid is fast and flexible. Payment is issued within 24 hours of receiving your device, often the same day, and you can choose PayPal, bank transfer, Visa card, gift card, or check. Shipping is free with a prepaid label.
Your quote also stays locked for 20 days. That means you can order your new iPhone now and send your old one in whenever it arrives, without worrying about your offer dropping in the meantime.
And you don’t have to take our word for it. The Whiz Cells is BBB accredited, with 310+ reviews on Trustpilot and 320+ on Google.
How to Sell Your iPhone 13 Pro Max
- Head over to The Whiz Cells
- Search for your iPhone 13 Pro Max.
- Select your device details: carrier, storage, condition, and whether the phone is paid off.
- Receive your offer and click checkout.
- Before shipping, sign out of your Apple Account and turn off Find My, then erase your iPhone.
- Follow the on-screen instructions to ship your device.
The Whiz Cells accepts phones with cracked screens and worn batteries, so your 13 Pro Max doesn’t need to be in perfect shape to get a solid offer.
Final verdict
The 13 Pro Max is still a capable phone, but the 18 Pro Max outshines it where it counts: battery, Siri AI, and the camera. If those are the things you’ve been working around, you already know your answer.
The good news is that the upgrade doesn’t have to come entirely out of your pocket. Your 13 Pro Max still has cash value, and The Whiz Cells will give you an instant quote, a free prepaid shipping label, and payment within 24 hours of your phone arriving. Get your quote today, and put the money toward your 18 Pro Max.
FAQs on iPhone 13 Pro Max vs Iphone 18 Pro Max
Should I upgrade from iPhone 13 Pro Max to iPhone 18 Pro Max?
It depends on how your 13 Pro Max is holding up. If your battery health is slipping, you take a lot of photos, you want the full Siri AI experience, or you’re running out of storage, the upgrade is worth it. If your 13 Pro Max still runs well and the battery is healthy, you can wait. The one timing factor to consider is resale value: the 13 Pro Max is now five generations behind, and every new iPhone release pushes its value lower, so selling sooner gets you more toward your upgrade.
A15 Bionic Chip vs. A20 Pro Chip performance?
The A20 Pro is a big step up from the A15 Bionic Chip. The A20 Pro upgrades to a 2 nm build, a 7-core GPU (up from 5), 12 GB of RAM (up from 6 GB), and a dual 16-core Neural Engine (32 cores in total, against 16). The icing on the cake on the A20 Pro Chip is the inclusion of Siri AI powered by Apple Intelligence.
Is the iPhone 18 Pro Max worth the upgrade?
Yes, the upgrade is worth every single penny. You get super-fast charging, a long-lasting battery, and an entirely new camera experience.
What is the cheapest way to upgrade an iPhone in 2026?
The cheapest way to upgrade your iPhone is to sell your old devices for instant cash at The Whiz Cells, to fund your next upgrade.
Best place to sell a used iPhone 13 Pro Max?
The Whiz Cells is the best place to sell your used iPhone 13 Pro Max. The Whiz Cells is a direct buyback platform that’s paid out over $49 million since 2012.
