What are the Android shells: a complete guide to interfaces

When you walk When you go to the store for a new smartphone, you often come across the fact that devices on the same Android look and behave completely differently. One phone seems overloaded with features, the other seems austere and fast. All this difference lies in the software add-on that manufacturers install on top of the “clean” operating system.

These add-ons are called shells or custom firmware. They determine the appearance of icons, notification shades, settings menus, and the presence of unique proprietary functions. Understanding what kind of shell is installed on the device will help you choose a gadget that will be convenient for you, and will not become a source of irritation due to unusual operating logic.

In this article we will examine in detail the main types shells, their key features, pros and cons. You will learn how MIUI it differs from One UIwhy OxygenOS it is praised for its speed, and whether it is worth overpaying for “pure” Android. This knowledge is critical for any user who wants to get maximum comfort from their digital device.

What is the Android shell and why do you need it?

At its core, the shell is a layer of software that modifies the standard Android interface. Google provides a basic system (AOSP), but it looks rather utilitarian and lacks many of the features modern users are accustomed to. Smartphone manufacturers take this foundation and create their own unique product on top of it.

The main goal of creating your own shells is to stand out from the competition. Companies like Samsung or Xiaomi are adding their own app stores, voice assistants, battery optimization systems, and unique control gestures. Without these add-ons, all phones would be as similar to each other as two peas in a pod.

However, there is a downside to the coin. Deep system modifications may result in delayed security updates. Sometimes heavy firmware slows down the work of even powerful hardware. Therefore, the choice between “pure” Android and a custom shell is always a compromise between functionality and stability.

⚠️ Attention: Some manufacturers in recent years have begun to abandon their own shell names in favor of “Android-based” branding (for example, Realme UI or ColorOS are often positioned simply as versions of Android). This is a marketing ploy, but technically these are still the same deep modifications of the system.

Popular shells from Chinese manufacturers

The Chinese smartphone market is extremely competitive, which forces local giants to create very feature-rich shells. The leaders here are Xiaomi, OPPO, Vivo and their sub-brands.

The most famous of them is MIUI (now HyperOS) from Xiaomi. It is famous for its huge number of settings that allow you to change literally every element of the interface. You can change fonts, themes, animations and even the behavior of system applications. However, the abundance of functions often leads to the presence of pre-installed advertising content in system utilities.

Shells from OPPO (ColorOS) and Vivo (Funtouch OS / OriginOS) rely on smooth animations and visual aesthetics. They often feature advanced multitasking and gesture controls that are more intuitive than stock Android. These interfaces are considered one of the most stable on the market.

For those who value minimalism, but want Chinese filling, there is OxygenOS from OnePlus. Historically, it was as close as possible to pure Android, but after merging with OPPO it became closer to ColorOS, while maintaining high speed.

• 🇨🇳 MIUI/HyperOS: Maximum customization, many functions, advertising is possible.
• 🎨 ColorOS: Excellent balance between design and performance, smooth animations.
• 🚀 OxygenOS: Performance, clean interface, focus on enthusiasts.
• 📱 Funtouch OS: Emphasis on the convenience of one hand and specific control gestures.

Flagship solutions from Samsung and Google

The two main players in the Western market offer fundamentally different approaches to organizing the smartphone space. One UI from Samsung and Pixel UI from Google set trends for the entire industry.

One UI was created taking into account ergonomics of large screens. All important controls are located at the bottom of the display so that they can be reached with your thumb. This is one of the most developed shells in terms of a set of additional functions: from the Samsung DeX mode (turning your phone into a PC) to advanced Knox protection.

In contrast, the shell on Google Pixel smartphones is as ascetic as possible. Here you will not find unnecessary settings or double menus. The operating logic is based on artificial intelligence: smart photo sorting, voice input and adaptive brightness. Updates to such devices come first, since they do not need to be adapted to a “heavy” add-on.

The difference in philosophy is obvious: Samsung gives you the tools to customize the phone for you, and Google tries to guess your desires in advance. The choice depends on whether you like to delve into the menu or prefer the “plug and play” principle.

Characteristics	One UI (Samsung)	Pixel UI (Google)
Interface complexity	High (many menus)	Low (minimalism)
Update speed	Delay 1-3 months	Instantly (first)
Customization	Very high	Medium (via topics)
Focus on features	Built-in utilities	Artificial intelligence

“Pure” Android: myths and reality

Many users dream of “pure” or “stock” Android, believing that this guarantees maximum speed and no lags. In fact, in its pure form, this system is now found only on Google Pixel smartphones and some devices of the Android One line (which has practically disappeared from the market).

What many call pure Android on Motorola or Nokia smartphones is in fact a slightly modified version. Manufacturers still add their applications, change icons and adapt drivers to specific ones. A completely “bare” system without any changes from the vendor is the exception rather than the rule. hardware. A completely “naked” system without any changes from the vendor is the exception rather than the rule.

The main advantage of this approach is predictability. The interface does not change dramatically from model to model, and third-party applications look organic. However, the lack of proprietary optimizations can lead to the battery draining faster than on smartphones with deep shells, where background processes are aggressively unloaded.

Why does “pure” Android slow down on cheap phones?

Without proprietary memory and processor optimization, which is found in MIUI or One UI, budget hardware may not cope with background tasks stock system, causing the interface to slow down.

How to find the version and type of shell on a smartphone

If you already own the device, but do not know what version of the software is installed on it, this information is easy to find in the settings. This can be useful when searching for instructions or solving application compatibility problems.

Usually the path to information is through the Settingssection. At the very bottom of the list you need to find the item About phone or System information. The Android version (for example, 13 or 14) and the interface version will be indicated there.

For more detailed information, including the build number and security update date, you must press repeatedly on item Build number. This will activate developer mode, but will also simply show detailed technical information about the current firmware.

On Samsung devices, the path looks like Settings → About phone → Software information. On Xiaomi you need to go to Settings → About phone and look at the logo in the center of the screen or the MIUI version line. On Pixel, the information is located in Settings → About phone → About Android emulator.

⚠️ Attention: Do not try to change the build number or Android version manually through the engineering menus. This may lead to the system stopping receiving over-the-air (OTA) updates or the phone not booting at all.

The impact of the shell on performance and battery

The choice of shell directly affects how long your smartphone will live on a single charge and how quickly it will open applications. Heavy interfaces with lots of animations and widgets consume more processor resources and RAM.

Chinese shells, such as MIUI or ColorOS, often have very aggressive energy saving algorithms. They can kill background applications to save battery. This is good for autonomy, but bad for instant messengers - notifications may arrive with a delay. The user often has to manually configure permissions for each application.

At the same time, optimized shells like One UI have learned to perfectly balance between smoothness and power consumption. Using AMOLED screens together with a dark interface theme can significantly save energy if the shell supports global dimming of system elements.

It is also worth considering that over time, developers may optimize the code. What was slow on Android 12 can work on Android 14 thanks to improvements in the system kernel and video accelerator drivers. Therefore, you should not judge the shell only by old reviews on the Internet.

Is it possible to remove the shell and install pure Android?

Technically, this is possible through the procedure of unlocking the bootloader and installing custom firmware (for example, LineageOS). However, this will void the warranty, may break banking applications (by resetting security flags), and requires advanced technical skills. This is not recommended for the average user.

Which shell is better for games?

For games, shells with dedicated game modes, such as MIUI (Game Turbo) or Funtouch OS, are often recommended. They allow you to block notifications, fix brightness and redistribute processor resources in favor of the game, minimizing lags.

Why do the same applications look different on different phones?

This is the merit of the shell. Manufacturers change system fonts, icon roundings, accent colors, and even standard applications (camera, gallery, dialer). The application can adapt to the system theme (Material You), but the basic style is set by the smartphone manufacturer.

Does the shell affect the quality of the photo?

Yes, and very much. Image processing algorithms (HDR, night mode, portrait) are built into the proprietary camera application, which is part of the shell. The same sensor in Xiaomi and Samsung will produce completely different images due to different software processing.

How often are shells updated?

Large manufacturers (Samsung, Google, Xiaomi) are now promising 3-4 years of major Android updates and up to 5 years of security updates for flagships. Budget models may receive updates less frequently - once a quarter or only security patches.