Tablet reviews: Features explained

With so many models to chose from – from Apple iPads to Android and Windows – choosing a tablet can be a daunting task. Especially as manufacturers love to use confusing jargon.

To help, we've singled out the key tablet features you need to be aware of, alongside an explanation of what each means. So if you don't know your touchscreen from your tethering, or don't have a clue what a Retina display is, you've come to the right place.

Alternatively, if you just want to get shopping, check out all of our latest tablet reviews.



The touchscreen is what you interact with to control the tablet. Similar to using a mouse and cursor on a computer, you touch the screen and swipe your finger to make selections, open up programs, move up, down and across pages and zoom in and out. You also use the on-screen keyboard to input text - so a screen that reacts accurately and instantly is essential.

There's a big difference between a good touchscreen and a bad one. The best feel very responsive and accurate, the worst feel very slow to react and are frustrating to use.

Discover the lengths we go to find the tablets with the finest touchscreens, by seeing how Which? tests tablets.


Just like computers and laptops, tablets are available with a variety of different memory options. Cheaper tablets tend to have 8, 16 or 32GB of memory built-in, while more expensive tablets offer 64 or even 128GB of space. 

The memory is used to store apps and media content - such as music, video and photos. If you plan to use your tablet for heavy-weight apps such as games, you'll want a larger memory. As a rough guide, a two hour HD film uses about 3.6GB, 12 albums of music about 1GB, while games can range from 20MB to 500MB (0.5GB) and beyond.

Cloud-Storage for tablets

The operating system and pre-installed apps will already take-up some of the space. Our tests measure just how much memory is really available, once the OS has been taken into account so you know how much is free for you to use.

On most tablets, there is a memory card slot - useful for expanding the memory of your device. It's worth noting that Apple iPads do not come with a memory card slot.

Alternatively, if you find you run out of space you can use cloud storage to store content – find out more by reading our expert guide to cloud storage

Operating system

The operating system, or OS, is the software platform which runs all the apps and functions on your tablet. 

Currently there are three types of operating system - the Apple iOS, the Android platform, and the two types of Microsoft Windows operating system.


Apple iOS - Unlike other tablet hardware manufacturers, Apple has its own operating system designed specifically for mobile devices such as tablets and smartphones. 

It's simple to use, and even if you haven't used a tablet before you'll be able to navigate the menu without any problems. 

You can download apps from the Apple app store - which has the largest selection of apps available.

Got the taste for an Apple tablet? Find out which iPad you should buy.

Android OS - Aside from Apple, most tablet manufacturers, such as Samsung, Google and Amazon, use the Android operating system. Android has a confectionery theme to help name the operating system. The current version is called Lollipop, with previous versions named KitKat, Ice Cream Sandwich and Honeycomb.

Manufacturers are able to tweak the Android system to suit their needs. For example, the Amazon tablets have restricted access to the Google Playstore, in order to tie you to the Amazon Kindle ebook system.

If the Google designed operating system looks good to you, then discover our pick of the best Android tablets.

Windows - Released at the end of 2012, Windows RT is the first Windows OS built specifically for mobile devices. The Microsoft Surface RT is the first tablet to run on this system. 

It is also possible to run the full Windows 8 operating system on a tablet. This gives you full functionality - meaning you can use your tablet to do the same tasks as you'd use your laptop for. However, the Windows 8 OS takes up more memory and guzzles more energy than the RT version. The Microsoft Surface Pro runs the full version of Windows 8.

The Windows 8 and RT homescreens look different to the traditional Windows layout. A series of brightly coloured tiles are designed for you to swipe or tap with your finger, and are displayed on the main menu, where there isn't a Start button. 

This takes a little while to get used to - but does suit touchscreen devices well. 

The Windows apps store isn't as well populated as the Android or Apple stores - but this is likely to change over time.

If you like the look of the Microsoft's operating system, see our rundown of the best Windows tablets.


Wi-fi, 3G and 4G

Tablets are great for browsing the web, but to do that you will have to get online. You can do this via wi-fi at home, if you have a wireless router set up. Outside the home, many cafés, pubs, restaurants and other public places have wi-fi networks that you can use. 

However, if  you want to regularly use your tablet on the move it might be worth opting for the 3G or 4G version of the tablet. But this could get expensive.

Find out the pros and cons of each and whether you should pay more with our dedicated guide to wi-fi or 3G and 4G tablets.


If your tablet doesn't have built-in 3G or 4G, you can sometimes tether your tablet to your mobile phone, sharing the phone's connection with the tablet.

To do this, you connect the two devices, usually via wi-fi. Some mobile phone networks charge for this service, with only some phones being supported in certain cases. Check with your network provider for details.


Looking for news apps in the Android Market, the main library of apps for Android tablets


Short for application, an app is a program that can perform specific tasks. It could be a game, a piece of office software, a news or weather program, a tool to help you find train departure and arrival times, catch up on TV programmes you've missed, or check in on your friends through Facebook.

Some apps are pre-installed on a tablet, though you will want to add more. You can browse through and download the ones you're interested in from app libraries online. Many apps are free, others you have to pay a small amount for.


The detail of a screen is measured in resolution, which is the number of pixels on the horizontal and vertical axis of the screen.

Resolution can also be measured in pixels per inch (ppi), which takes into account the size of the screen, and so gives a more accurate measure of the screen's detail by revealing the density of the pixels. The more pixels crammed into an inch, the more detailed the screen should be.

To find the tablets with the sharpest screens, use our interactive tool to compare tablet features and prices.

OLED and Retina display

A Retina display is a type of screen technology from Apple on its latest iPads.

It gets its name from the claim that when viewed from a normal distance, the screen is so sharp that you won't be able to detect the individual pixels in the screen. This supposedly makes it as good a display as the human eye can comprehend.

Other manufacturers have begun to fit Organic Light Emitting Diode (OLED) screens to try and match Apple's Retina display. You may also see it billed as AMOLED – Active-Matrix Organic Light Emitting Diode.

Each display has its strengths and weaknesses. OLED screens can degrade faster than the LCD Retina displays, but they also tend to produce brighter, smoother images than most LCD technology.

That said, the Retina displays on new Apple products produce brightness and sharpness to match most OLED screens.

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