Are you considering buying a tablet or an electronic reader for PDF files? Here’s a guide to the top and cheapest options

The main advantage of the Adobe PDF mobile document format is that it can be read on almost any type of device. So almost any device will act as a PDF reader, including smartphones, tablets, laptops, home computers and any operating system as well. 

But in fact, many people need to read PDFs for work, scientific research or study, and there is a device «e-reader» dedicated for this purpose.

The difficulty in reaching a balanced equation between the clarity of the text, the size of the screen, and the mobility device, battery life, ease of use, versatility and price, finally get the best choice according to your personal needs; these are the most prominent options , according to published by the newspaper The Guardian British.

Regarding the monitor

E-readers, like Amazon Kindles, are designed to replace printed books, so they tend to be novel, but thinner. 

They feature electronic ink displays, unlike laptops, which are readable from the outside. It doesn’t need much battery power, so it can work for many hours between charging periods. 

It’s exactly what you might want, except for the size of the screens. 

For the purpose of use, the best screen size will be 210 x 297 mm, the same size as A4 paper. 

This is 14.3 inches diagonally, so a 14-inch screen will be the closest thing to real paper size. However, the size of the screens from 12.3 inches to 13.3 inches remains very acceptable. 

The other key point is the ratio of dimensions 1: 1.414. Due to the inability to accurately obtain A4 paper size, the best possible match would be a 3: 2 aspect ratio device, such as Microsoft Surface Book   or Google Pixelbook . These devices come in 1: 1.5 dimensions. 

The next best option would be either the 4: 3 (1: 1,333) aspect ratio, which conventional TVs use, or the 16:10 (1: 1.6) aspect ratio, which Apple’s MacBook Pro uses, for example. The 4: 3 aspect ratio appears in screen resolutions from 640 x 480 (VGA) to 1440 x 1080 and 1920 x 1440. 

The 16:10 aspect ratio includes a screen resolution of 1440 x 900, 1920 x 1200 and 560 x 1600.

Unfortunately, the cheapest types are widescreen 16: 9 screens, which is why, in part, they are used in cheap laptops. The aspect ratio of these monitors, 1: 1.778, does not fit well with the dimensions of A4 paper (1: 1.414). 

You can try viewing some PDF files on full HD 1920 x 1080 displays to see if they meet your needs. If you find it right, the cheap Linx 12X64 ($ 325) will do the trick.

But E-ink screens remain more comfortable and easier to use for the eyes.

Custom eReaders

The  reMarkable   PDF document reader is aimed at the digital writing market, not the digital reading market, although most electronic reading devices support the use of pens for writing signatures, annotations, and comments. 

Or consider the Onyx Boox collection , which includes seven larger screen readers. The top models of the range, the Max 2 ($ 749) and Max 2 Pro ($ 849), are the best to use for those purposes, with a screen size of 13.3 inches. 

Note Pro ($ 599), Gulliver Note ($ 449) with a 10.3-inch display, and Euclid ($ 319) with a 9.7-inch display are cheaper, but with smaller screen options. As is known, reducing the size of PDF images makes them harder to read. 

There is Sony, the big name in the world of electronic reading devices, but unfortunately, the 12.3-inch DPT-RP1 from Sony will cost you $ 877, which is equivalent to the price of a good laptop. 

But according to a. to. Valuable and complete on Amazon, the DPT-RP1 lasts for two days after charging, much more than you would with a traditional tablet or laptop. 

The Boyue Likebook Mimas comes with a 10.3-inch screen at a cheaper price, but with fewer options and screen size. The Chinese manufacturer sells it online for $ 525, while sells for $ 528. And sometimes it may be cheaper on AliExpress . If you’re shopping, this year’s Mimas is equipped with the RK3368 chipset and Type-C port, while Likebook Note is an older version of the device.