How to Read at Night on Your Tablet, iPad or Smartphone

Researchers have been saying for years and years that reading an on LCD screen late at night will disrupt your sleep, and techies have been working nearly as long to come up with fixes for that problem.

There are two general solutions to the problem (three, if you count not using your device within two hours of going to bed). One is called a night reading mode, and the other is using the software settings to apply a blue light filter to the screen.

One common solution offered by many reading apps is to invert the colors so that the text is white on a black background. It's called a night reading mode, and you can find it in most reading apps such as Kindle, iBooks, Aldiko, Kobo, etc, and looks something like this:

How to Read at Night on Your Tablet, iPad or Smartphone e-Reading Software Tips and Tricks

The night reading mode is not unpopular with ebookophiles, but I'm not sure that it really counts as a solution to the sleep problem.

Anecdotal reports suggest that it might help (some users swear by it) but the only true solution would be to use a blue light filter.

Study after study has shown that the blue light emitted from a screen can impact your sleeping patterns. Why blue and not any other color? I don't know the answer to that, but I can say that it's what everyone is saying and it is where all the app developers are turning their attention.



If you like to read or work on your PC late at night then you should look at an app called f.lux. It adjusts the color settings on your monitor based on the local time for your location. You can also set the filter manually, but the automatic setting looks a lot like the Oyster demo above.

And most importantly, it changes the color settings on a system level. So if you install F.lux, it will affect all the apps you use and make them look different.

The F.lux app for Windows comes so highly recommended that I've not heard of an alternative. But I can't make the same remark about Android.

Fire Tablets

In December 2015 Amazon released an update to Fire OS Bellini which added a blue light filter called Blue Shade. This feature is only available on the latest model year Fire tablets, and you can see screenshots here.


Update: Google added a blue light filter to Google Play Books in late December 2015.

A quick search of Google Play reveals that there are countless free apps which claim to offer a blue light filter, but I'm not so sure how true that is.

I've checked a half-dozen, and many simply turn down the backlight and apply a grey, and not blue, filter. There are a few apps which do apply a color filter, and some even offer alternate color options for the filter (here's one).

Edit: One app in particular, Twilight, has been recommended several times in the comment section of this post. I'd try that first.


You have far fewer options for late night reading on your iPad or iPhone. There's the Oyster app mentioned above and the night reading mode in ebook apps, I only found a few options for iOS. Opera, for example, just updated their browser with a night reading mode and a blue light filter, but there's no general solution.

Edit: But there is Google Play Books.

I'd bet that the lack of options stems from Apple not letting apps mess with the system settings. And that means we'll just have to wait for Apple to discover this problem and decide to decide to solve it.

Other Platforms

Not having other devices to check, I can't tell you whether you can find blue light filters on other platforms.

If you use one, let us know in the comments. I'm sure I won't be the only one who is interested.

Nate Hoffelder

View posts by Nate Hoffelder
Nate Hoffelder is the founder and editor of The Digital Reader: He's here to chew bubble gum and fix broken websites, and he is all out of bubble gum. He has been blogging about indie authors since 2010 while learning new tech skills at the drop of a hat. He fixes author sites, and shares what he learns on The Digital Reader's blog. In his spare time, he fosters dogs for A Forever Home, a local rescue group.


  1. […] bedtime mode is more or less the blue light filter I was writing about in my last post. This filter is intended to minimize the sleep disruptions caused by late night web browsing by […]

  2. Michael27 June, 2015

    I can see how that’d be useful if you’re the sort to read in total darkness. But if you keep a light on and it uses CFL or LED bulbs, you’re most likely blasting your eyes with blue light even on dim settings, unless you invested in special bulbs.

    If you don’t mind stares from other people, put on a pair of wraparound blue-blocking glasses instead:

    Totally compatible with all your light-emitting devices, even Apple’s. I find my brain adjusts to reading with those much more readily than it does to changing the colors and brightness on the display I’m looking at.

  3. Al the Great and Powerful27 June, 2015

    I find that if I read until I am tired, I go to sleep just fine (tablet or computer screen or printed word makes no difference). And having been a long-time coffee addict/fiend, I can drink coffee right up to bedtime as well.

  4. Basem27 June, 2015

    Regarding eye strain, the display technology trumps anything else. It’s not simply PPI, though that helps; there is contrast, colour reproduction etc. That is why IPS technology is better than TN panels and Amoled/OLED is superior to IPS (TN panels are very harsh on the eyes even with a high PPI). Samsung produce the best displays and have the know-how to produce screens with an even light emission, even with a relatively low ppi (e.g. the crystal clear view technology they use with their Samsung Tab 4 beats any other tablet with similar ppi). The best of the lot has to be OLED/Amoled screens as they don’t rely on a back light. I can read easily with an Amoled display with hardly any eye strain and I am sensitive to light. Samsung also come with reading mode built in to their user interface, which is better than Asus’s own reading mode (I currently use a Tab S 10.5 for reading PDFs). Overall, if it wasn’t for clumsy firmware and hardware decisions, Samsung tablets would beat the iPad Air in every sense. If it was just the screen, then no one compares to Samsung.

    Needless to say, e-ink should be standard for e-reading but there isn’t any serious contender for a 10.1 inch e-ink device. The Onyx M96 runs full Android, which isn’t suitable for an e-ink display, and with a low ppi and charge high prices; also I’ve used the Icarus eXcel (Onyx M92 re-branded) and the contrast and firmware was poor; however, there was good functionality. The ideal large e-ink screen would be the Paperwhite with a 9.7 inch display. Unfortunately, a 9.7 inch e-ink Paperwhite would be for a niche market and with little consumer demand, hence Onyx can charge their inflated retail price.

  5. Thomas28 June, 2015

    I usually read on my tablet every night before I go to sleep. I use FBReader’s night mode, and I’ve never had any problems sleeping afterwards. One other reason to use night mode is that it uses less battery power than normal.

  6. Brandon M.28 June, 2015

    Hi everyone,

    A company in Spain, Reticare (, claims to have a screen protector that greatly diminishes the blue light emitted by LCD screens.

    I have them on most of my devices. It definitely darkens the brightness of your screen, but you can still make it pretty bright if you desire–even with the protector applied. The only way you can really tell that it’s dimming the brightness is by comparing it to the same device without the protector (at least that’s my experience).

    The protectors a pretty penny because of overseas shipping costs.

    I haven’t noticed any difference in my sleeping patterns; I just hope the product is actually doing what it states and that it’s actually helping my eyes!

    Hope you guys find the website/product helpful (just click my name or the link in my comment),

  7. Brittany G.28 June, 2015

    I’ve used an app on my android phone for years called Twilight that gradually turns the screen more orange as night comes on. It took some getting used to at first but now I don’t notice it at all. I do notice if I have to turn if of for some reason though: my eyes immediately feel more strained.

    The only problem I’ve ever had with the app is a weird one: sometimes buttons in the Amazon Appstore app don’t work unless Twilight is turned off. Since I rarely use the app store at night, I don’t mind turning it off for those few times, but it took me ages to figure out what was happening.

  8. reichsputin28 June, 2015

    I think the nicest working automatic blue light filter for Android is Twilight from the Urbandroid team, the creators of Sleep as Android.

  9. Basem28 June, 2015

    Yes, Android has a lot of Blue light filter apps and some are really good. For Windows the best option is to install f.lux:

    If you use a Chromebook, then the options are limited but there is g.lux available via the Chrome web store.

    1. Nate Hoffelder28 June, 2015

      That’s what everyone has been saying, yes.

  10. mygadgetblog.net28 June, 2015

    On Android I would recommend twilight.

    “The Twilight app makes your device screen adapt to the time of the day. It filters the flux of blue light emitted by your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. The filter intensity is smoothly adjusted to the sun cycle based on your local sunset and sunrise times.”

    It works just great and it is even useful, when using a night mode setting (white on black) on your tablet or phone.

    1. Nate Hoffelder28 June, 2015

      Indeed. I have so many recommendations for Twilight that I’ve updated the post.

  11. […] Für PC und Mac gibt es mit f.lux ein kostenloses Tool, das abhängig von der Systemzeit die Farbmischung des Bildschirm anpasst. Im Android-Kosmos erfreut sich Twilight sehr großer Beliebtheit. Das Fachblog The Digital Reader hat sich diese und weitere Anwendungen für eine bessere abendliche Lektüre für einen Übersichtartikel angeschaut. […]

  12. Marilyn Bailry16 July, 2016

    iPad has a setting that inverts black back groud,white print ,also gray background soft white print very nice


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