Using the on-screen keyboard is a laggy experience. The same occurred when using the built-in web browser or any other downloaded application. It’s very noticeable when reading, which disappears as soon as you change the refresh rate, only to reappear a few pages later. And while they work really well on the bigger 13-inch tablet, they don’t seem to function as well here and that means there’s heavy ghosting on most of the applications. The Tab Ultra C has multiple refresh rate options like the Tab X. And this happens on both the default reading application and on the Kindle or Kobo apps that I downloaded from the Google Play Store. While I loved reading on it, simple tasks like page turns are occasionally slow – whether you use the screen to navigate to the next page or the keyboard (the PgDn key). The color screen is sadly where all the good things end with the Onyx Boox Tab Ultra C. Powerful processor for an ereader, but sluggish performance.(Image credit: TechRadar / Sharmishta Sarkar) Onyx Boox Tab Ultra C review: performance Even with muted colors, it’s a pleasure reading on the Tab Ultra C’s screen. A new tech called Gallery 3 is ready for mass production which promises better saturation, but we still haven’t seen a single color ereader with this screen yet. E Ink Kaleido tech has limitations and can only display about 4,096 colors that appear washed out on screen. Having a color screen also means you can choose to highlight text in different colors if you are in the habit of adding annotations and notes. And you can draw in color too.ĭon’t expect bright colors like you would on an iPad or any other multimedia tablet. Screen resolution for black and white is 300ppi. All your ebook covers will be displayed in color at a resolution of 150ppi, which is standard for most color ereaders. Using E Ink’s Kaleido 3 screen tech gives the Tab Ultra C a nice display for comics and ereaders. The main talking point here is the 10.3-inch color screen… there aren’t too many such options on the market. (Image credit: TechRadar / Sharmishta Sarkar) However, the sharp corners give it a sleek look. Add in the weight of a case, particularly the keyboard folio, and this is not a very comfortable ereader to use on the go or read while lounging in bed. Pick it up and you instantly feel every bit of its 490g bulk – it’s perhaps one of the heaviest ereaders I’ve tested. Compared to other 10.3-inch note-taking ereaders, it really is chunky and heavy. The Tab Ultra C is still a “black slab” as we called the black-and-white model and is really quite thick and heavy. In terms of overall design, nothing has changed from the Tab Ultra.
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