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How About H2OS by OnePlus: All You Must Know About IT Before Buying a Smartphone!

How About H2OS by OnePlus: All You Must Know About IT Before Buying a Smartphone!

OnePlus is a mobile phone manufacturer that does things in its way - it only makes flagship smartphones, so it does in making the operating system. As for more details, let’s go into more detail about the H2OS 10 through the in-depth review.

Model: OnePlus 7T H2OS 10.0.4 Android Q

Among all custom user interfaces by major manufacturers, the H2OS 10 by OnePlus is the closest to the native Android system, which is the main feature of OnePlus smartphones. You can tell whether it works well or not according to how you feel about it. You should inspect it in two aspects, including the visual effect and the user experience. Next, I will do a review of H2OS 10 based on these two aspects.

UI & UX 

Whether it pleases the eye or not depends on the UI and UX. UI stands for User Interface, while UX stands for User Experience. UI and UX are not about arts and creation - they don’t need to be splendid or unique, but simple, easy-to-use, uniform, safe, humanized, and to the liking of most people. As for the simplicity and easy operation, I think H2OS 10 is to the utmost perfection. 

Elements of the system

As mentioned earlier, H2OS 10 approximates the native Android system, particularly in the design of the user interface. The main background color of H2OS 10 is light gray (#fafafa); the background color of the blocks is white (#ffffff); the default accent color is blue (#2196f3). Additionally, accent colors vary in different applications. For example, the dark blue (#0071cd) for Dial, the teal green (#01998c) for SMS, the lake blue (#01abc2) for Gallery, the purple (#3f3da2) for the Clock, the orange-yellow (#ffbe00) for Calculator, the brown (#8c523e) for Notebook, and so on. 

Although it doesn’t look like MIUI 11 with vibrant colors, the colors of H2OS vary from deep to light, bright to dark, not so distinguished, basically the same as the native Android system.

Apart from colors, the elements of H2OS 10 accord with the native Android system, such as the status bar, notification bar, list, icons, etc.

Home Screen

The home screen of H2OS 10 is simple, as there is neither a search box nor an information flow. Slide down, and you can enter the notification bar; slide up, you can access the Apps. It feels not redundant at all.

What’s worth mentioning is that H2OS 10 keeps the App drawer of the native Android system, while providing the option of a drawer-less home screen. It allows users to choose as they like.

Transition Animation

OnePlus smartphones are the smoothest Android phones that I’ve ever used, partly because of the 90Hz refresh rate of the screen, and the transition animation of H2OS 10. 

As far as I know, Android phones don’t run smoothly. One of the main reasons is the poor transition animation. H2OS 10 is an Android system that offers the best transition animation. Of course, I can feel it, but it is hard to describe the feeling. Words might be different from the actual experience. You might as well try it out if you get a chance. 

Title Bar & List

In terms of the design of the title bar, H2OS 10 retains the tradition of Google’s Material Design. The title bar is placed on the left, while the Action Bar is on the right. The bottom of the title bar is separated by a gray line. Most applications use such a format. 

As for the design of the list, I am confused about the partition of H2OS 10 as there are four different ways of partition in total, including the thick, thin, ultra-fine gray dotted line and white space.

These are four common ways of partition. However, the use of thin, ultra-fine gray dotted line and white space seems confusing, as you can see the disharmony from the three pictures below. Setting aside the differences in colors, the use of dotted lines is not consistent. For the same partition, some are left white, while others are separated by a thin gray dotted line. 

What if all are separated with white space without lines? Will it be better? Of course, it’s merely my personal opinion. However, you can see the difference by looking at the picture below.


The features of H2OS were not outstanding before, because users could only customize essential elements, such as the background color, accent color, icons, and so on. In the latest H2OS 10 operating system, OnePlus has made a lot of improvements. Not only does H2OS 10 have three preset themes, but it also supports changing the accent color, hue, shape, icon pack, fonts. Compared with the MIUI 11, FlymeOS 8, the system doesn’t stand out in terms of distinguishing features.

As you can see the accent color, hue, shape, icon pack from the above picture, I am not going to elaborate on them. H2OS 10 has two built-in fonts: one is Nato Sans, the other is OnePlus Slate. These two fonts don’t differ a lot from each other. At a glance, the main difference is the boldness. You can also choose from four different sizes of these two fonts. H2OS 10 doesn’t support third-party fonts by default.


Overall, H2OS 10 continues the design of Android 10, but some parts seem disharmonious, namely, the App Store (including Game Center) and Browser. These two Apps don’t completely conform to Material Design. If you have used OPPO smartphones, you’d feel familiar with the App Store and Browser of OnePlus H2OS 10, because they are derived from OPPO.

The elements on the entire web page, such as the iridescent background, light green buttons, green fonts, search box, are all in the same style of ColorOS 6. Although OnePlus has modified them a little bit, they don’t harmonize enough with the H2OS 10. 

Cloud Service

OnePlus always lag behind in the Cloud service. Therefore, OnePlus thinks highly of it this year, narrowing the gap between its Cloud service with that of other operating systems like MIUI 11, EMUI 10. 

Like many significant manufacturers, OnePlus provides 5GB free cloud storage for H2OS 10 users to synchronize contacts, dial logs, SMS, notes, events, photos, home screen backup. What’s more, it also offers the function of “Find My Phone.” 

As for the price to expand the cloud storage, OnePlus gives you a slightly more attractive price than Huawei and Xiaomi. However, it only allows you to buy a monthly plan. The disadvantage is quite evident for those who need more cloud storage in the long run.

Voice Assistant

The voice assistant is an essential function that OnePlus didn’t provide until the development of H2OS 10. OnePlus has introduced a voice assistant named “Xiaobu” for driving. It is a pity that there is still no update for the function. According to the official statement, it will be available by the end of this year. 

System Navigation

Nowadays, most major manufacturers incorporate full-screen gestures into operating systems like MIUI. H2OS 10 is not an exception. You can swipe inward from the left or right to return, swipe from the bottom to return to the home screen, swipe upward to enter the split-screen mode. On the basis, H2OS 10 has introduced a new gesture that allows you to quickly switch between different Apps, i.e., switching to the left/right from the bottom. 

By doing so, not only can you feel the convenience of gesture control, but also the exceptional responsiveness and smoothness of the H2OS 10.


The HiBoard is to break the absolute independence of the system and data from third-party Apps for gathering important information. Compared with other systems, such as MIUI, Flyme OS, Color OS, H2OS 10 lags behind in HiBoard functions. Concerning the access to functions of third-party Apps, H2OS 10 only provides three functions, including Amap, taxi-hailing, package tracking. There are also shortcuts and widgets. 

Dark Mode

Dark Mode is a new feature of Android 10, which all major manufacturers are making. Although H2OS 10 is nearly the same as the native Android system, the Dark Mode has been eliminated and replaced by the Night Mode and Reading Mode.

What’s Dark Mode (Night Mode)? The most common practice is about turning the background color black while making other contents all in white to relieve the eye strain and reduce the power consumption due to the high brightness of the screen. 

The Night Mode of H2OS 10 is equivalent to the Eye Protection Mode of most smartphones because the background color isn’t changed, but the color temperature and brightness of the screen to reduce the blue-ray. Nevertheless, you can make the entire background black through the settings.

The Reading Mode is a unique feature of H2OS 10, which makes the screen black and white for more immersion in reading, just like Kindle. However, when using the Screenshot function, you can still get pictures in original colors.


Judged from the above, H2OS 10 seems satisfying in all aspects, offering excellent user experience, as you can see the simple design throughout the entire system. 

However, the simplicity is both an upside and a defect. The simple H2OS 10 brings efficient and smooth operation, which is unrivaled in comparison with nearly any other smartphone manufacturer. 

Meanwhile, the “simple design” of H2OS 10 means the elimination of some functions, such as the convenient HiBoard of Color OS, the free customization of MIUI, the multi-screen collaboration of EMUI, the innovative Big Bag of Smartisan OS that is followed by major manufacturers. 

As to whether the simple design is an advantage for not, it depends on your preference. For those who prefer the simple style, H2OS 10 is absolute “treasure”; otherwise, H2OS 10 means “crudeness.”

(Note: Pictures from

OnePlus 7T Pro 4G Phablet 6.67 inch Oxygen OS Snapdragon 855 Plus Octa Core 8GB RAM 256GB ROM 3 Rear Camera 4085mAh Battery International Version



Oneplus 7T 4G Phablet 6.55 inch Oxygen OS Based Android 10 Snapdragon 855 Plus Octa Core 8GB RAM 256GB ROM 3800mAh Battery International Version



Oneplus 7T 4G Phablet 6.55 inch Oxygen OS Based On Android 10 Snapdragon 855 Plus Octa Core 8GB RAM 128GB ROM 3800mAh Battery International Version



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