Sleep better with Koala™! A faster web browser with downloads, that improves the quality of your sleep!

Research has demonstrated that nighttime light exposure suppresses the production of melatonin, the major hormone that controls sleep and wake cycles. The "blue", short-wavelength light is the most melatonin-suppressive, and is also emitted by devices such as televisions, computer screens, and cellphones.

(Note: Koala dimming effect only works while inside the app!)

The Koala™ Web Browser filters out the blue light to create a healthy, energizing sleep cycle. It is the first web browser that cares about your sleep quality! Koala™ makes the color of your iDevice display adapt to the time of day, warm at night and like sunlight during the day. All automatically!

* Automatically adjust the color temperature depending on your local time and sunset/sunrise times
* DOWNLOAD and view files!
* Darkness Boost for lower brightness during the night
* Multiple browser tabs
* Private browsing
* History and Bookmarks
* Sharing to Twitter, Facebook, Email, Text, WhatsApp etc
* Select search engine (Google, Yahoo!, Bing, DuckDuckGo)
* More features coming soon!

What's New

Version 7.1

- Bug fixes and updates to downloads feature
- Night mode now active while viewing downloaded files

Ratings and Reviews

3.5 out of 5

18 Ratings

18 Ratings

Appalling app


Well first of all the installation was impressively fast and the orange light thing is ok. Now onto the bad points. The first bad point is that there are lots of ads and it just crashes. Secondly, this site only uses Google whereas I thought that it would change the device's entire colour to be blue. I also like to play games on a night and they are not on Google which means it does not help me in any way possible.

Love this koala


Easy to use, definitely work as it should

Good but...

gaming exreme

This app is perfect but my phone CPU gets way too hot and it drains the battery super fast. But except that it dose the job very well good job!


AppRebel, Inc.
26 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
English, French, German, Italian, Japanese, Korean, Russian, Simplified Chinese, Spanish
Age Rating
You must be at least 17 years old to download this application.
Unrestricted Web Access
© 2017 AppRebel, Inc.
In-App Purchases
  1. Remove Ads £0.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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