Compare the Samsung Galaxy S21 to the Apple iPhone 12

Written by Evany

Edited on

7 October 2025

ยท

08:33

Compare the Samsung Galaxy S21 to the Apple iPhone 12

If you want a smartphone with a lot of options, the Samsung Galaxy S21 and the Apple iPhone 12 are the right choice. Both devices have a screen of the highest quality, multiple cameras, and they support the fast 5G network. They differ in the type of camera and software. In this article, we'll tell you more about these smartphones.

New: the Samsung Galaxy S24 series

Samsung has released the Samsung Galaxy S24 series. As a result, the Samsung Galaxy S21 isn't as readily available anymore. Aside from the Samsung S24, the S24 series also includes the Samsung S24 Plus and S24 Ultra. All devices have a powerful processor, so they can handle any task.

Everything on the Samsung Galaxy S24 series

Samsung Galaxy S21 128GB Gray 5G

  • You can take razor-sharp photos with the different cameras of this device.
  • The screen refreshes 120 times per second, so animations are displayed smoothly.
  • This device is suitable for the most demanding apps.
  • Customers rate the battery of the S21 less highly than the battery of the iPhone 12.
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  • With the different cameras in this device, you can take razor-sharp photos.
  • You can use this device for the most demanding apps.
  • Watch movies and series in high quality on the sharp OLED screen.
  • With a refresh rate of 60 times per second, the screen is less smooth than that of the S21.
  • You don't have a telephoto lens, zo you can't zoom in without quality loss.
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Comparison Samsung Galaxy S21 and Apple iPhone 12

Samsung Galaxy S21Apple iPhone 12
Screen6.1-inch AMOLED6.1-inch Super Retina XDR (OLED)
ProcessorSamsung Exynos 2100A14 Bionic chip
RAM8GB4GB
Operating systemAndroidApple iOS
Cameras 12MP standard lens, 12MP wide-angle lens, 64MP telephoto lens12MP standard lens, 12MP wide-angle lens
Selfie camera10MP selfie camera12MP TrueDepth selfie camera
Storage128 and 256GB64GB, 128GB, 256GB
Connection options4G and 5G4G and 5G
ConnectorUSB-CLightning connector
SIM cardSlot for 2 SIM cardsSlot for 1 SIM card. Extra phone number with eSIM.

Screen

S21: large 6.2-inch AMOLED screen

S21: large 6.2-inch AMOLED screen

On the 6.2-inch AMOLED screen of the Samsung Galaxy S21, you'll have enough screen space. This way, you can comfortably check your email and type notes. You can see everything in the highest quality. When you're on social media, for example, you can be sure your photos and videos go online in high quality. It's possible to control the device with 1 hand and it fits in almost every pocket.

iPhone 12: a bit smaller 6.1-inch OLED screen

iPhone 12: a bit smaller 6.1-inch OLED screen

The 6.1-inch Super Retina XDR display of the iPhone 12 is a bit smaller, but you'll barely notice that. This way, you'll have enough screen space to comfortably scroll through your inbox or to read business blogs. Thanks to the OLED technology, all images are high quality. Just like the S21, it's possible to control this smartphone with 1 hand and it fits in almost every pocket.

Processor and RAM

S21: Samsung Exynoss 2100 with 8GB RAM

S21: Samsung Exynoss 2100 with 8GB RAM

The S21 has a powerful processor that can easily run demanding apps. For example, photo and video editing. You can also open multiple apps at the same time. That's useful if you're typing an email and you need to quickly add a link from your browser. Thanks to the 8GB RAM, you can multitask all you like. Smoothly switch between Gmail and Evernote, for example.

iPhone 12: Apple A14 Bionic Chip with 4GB RAM

iPhone 12: Apple A14 Bionic Chip with 4GB RAM

Thanks to the powerful Apple A14 bionic Chip, you can launch even the most demanding apps quickly and they'll also run smoothly. You mainly notice that when you edit videos. The iPhone has less RAM, but thanks to the seamless connection of the processor to iOS, it'll barely differ from the S21. That's why the iPhone 12 also allows you to quickly switch between apps and to use them at the same time. For example, put on some music when you're working on a presentation.

Expert review Apple iPhone 12

Operating system

S21: open operating system with many options

S21: open operating system with many options

The Samsung S21 runs on Android. That's an open operating system for Google smartphone and tablets. Samsung made their own version, so icons and menus have a recognizable look. You can download all your apps from the Google Play Store. That's more extensive than the App Store, but also less secure. Google doesn't check every app. Do you have a Windows laptop? The S21 will work together with it more easily than the iPhone 12.

iPhone 12: easy to use

iPhone 12: easy to use

The Apple iOS operating system is known for its simplicity. They have less extensive options to adjust your home screen, for example. Over the years, that has changed, because you can now also add widgets. This way, you can see all your appointments at a glance. You can download familiar business apps like DocuSign and MailChimp via the App Store. If you use an Apple iPad or MacBook, the iPhone will work together with those seamlessly.

Storage and connection options

S21: 2 choices for storage, 4G/5G, Dual SIM

S21: 2 choices for storage, 4G/5G, Dual SIM

To store all your apps, you need enough storage. With the Galaxy S21, you can choose between 128GB and 256GB. Do you take many photos or record many videos? Always choose more storage. The device supports both 4G and 5G. with 5G, you'll have a faster and more stable connection than with 4G. This allows you to have high-quality video calls. You do need a mobile data plan for 5G. You can also easily slide a second SIM card into the device if you want to be available via 2 numbers.

iPhone 12: 3 choices for storage, 4G/5G. eSIM

iPhone 12: 3 choices for storage, 4G/5G. eSIM

With the iPhone 12, you'll have an extra choice for the storage. In addition to 128 and 256GB, there's also a 64GB version. This last version is enough for all your apps and photos, but keep in mind that the storage is limited. It's possible to expand it with an iCloud subscription. The iPhone 12 also allows you to quickly send emails and files via 5G internet. You do need a 5G mobile data plan, of course. You can use a digital eSIM if you want to be available via an extra number.

Conclusion

Both devices are currently some of the best smartphones. The biggest difference between the Galaxy S21 and the iPhone 12 is the design, the extra camera lens of the S21, and the operating system. For example, all your information is better protected from hackers with the closed iOS. Do you use an iMac or iPad? We recommend the iPhone 12 because of the seamless cooperation within the Apple ecosystem. If you have a Windows laptop, choose the Samsung S21.

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Article by Evany

Phone Expert.

Evany