Reading e-books on a smartphone has turned from a rare hobby into an everyday necessity for millions of users. Among the many applications for Android, one that stands out is Cool Reader a powerful open-source tool that is valued for its flexibility of settings and support for almost all existing formats. However, the reader itself is only a “reader”, and to start reading, the user must independently find and download the content.
Many beginners mistakenly believe that the application contains a built-in store, but this is not the case. Cool Reader works exclusively with local files stored in the device’s memory or on an external memory card. To enjoy your favorite novel or technical literature, you need to know where to safely look for files and how to correctly transfer them to the application folder. This process requires minimal technical skills, but opens up access to a huge amount of literature.
In this article we will examine in detail not only the downloading process, but also the intricacies of customizing the interface to suit your eyes, managing the library and solving typical problems with encodings. You will learn which sources are reliable and which ones are best avoided to avoid infecting your device with malware. Proper organization of your digital bookcase will save you hours of time in the future.
Installation and initial setup of Cool Reader
The first step towards comfortable reading is installing the application itself. It is best to download Cool Reader from the official store Google Playas this guarantees you will receive the latest stable version without the risk of APK file substitution. After installation, the application will automatically scan the device's memory for supported formats and create an initial library.
However, the standard settings may not be suitable for every user. It is recommended to immediately go to the menu Settings → Screen and select the appropriate display mode. For reading during the day, the optimal mode is with black text on a white background, while for night reading it is better to switch to inversion or sepia to reduce the load on optic nerve.
Turn on the “Keep the screen on” mode in the application settings so that the smartphone is not blocked during time to read long paragraphs.
It is also important to customize the font to suit you. In the Settings → Font section you can change the typeface type, size and line spacing. Experts recommend using serif fonts for fiction and sans serif fonts for technical documentation. The correct selection of point size (font size) is the key to ensuring that your eyes do not get tired even after an hour of continuous reading.
⚠️ Attention: When downloading APK files from third-party sites, be sure to check the digital signature of the developer. Modified versions of readers often contain hidden miners or advertising modules.
Searching and downloading books: safe sources
Searching for literature on the Internet is a process that requires caution. There are many resources that offer free content, but the quality of the files and the security of the sites vary greatly. The most popular formats for Cool Reader are FB2 i EPUBas they support line breaks, tables of contents and text formatting, unlike simple PDF or TXT files.
When downloading books, you should pay attention to the reputation of the resource. Large libraries that have existed for more than 10 years usually value their reputation and carefully moderate downloaded content. Small file hosting services often suffer from the presence of viruses in archives or the substitution of book contents for advertising brochures. Always check the file extension before opening.
- 📚 Project Gutenberg —a huge collection of books that have gone into the public domain, ideal for original classics.
- 🌐 Librusek and Flibusta —popular mirrors with a huge database of modern literature in Russian (require the use of proxies or mirrors).
- 💾 Telegram channels is a quick way to get a book, but requires manual checking of files for security before opening.
For ease of searching, you can use specialized search engines that index only book resources. When entering a query, add a file format, for example, “book title fb2 download” to immediately filter out inappropriate results. This will save traffic and time on converting files.
Working with formats and converting files
Although Cool Reader supports many formats, including DOCX, HTML, RTF and PDB, not all of them are displayed equally well. The format PDF, for example, is fixed and does not scale well on small smartphone screens, requiring constant horizontal scrolling. For mobile reading, streaming formats that adapt to screen size remain optimal.
If you downloaded a book in an inconvenient format, it can be easily converted. There are many online services and desktop apps, such as Calibrethat allow you to convert a file into a native view for the reader. Conversion to FB2 often solves problems with corrupted encoding and lack of table of contents in old files.
| Format | Display quality | Image support | Recommendation |
|---|---|---|---|
| FB2 | Excellent | Yes | Ideal for fiction |
| EPUB | Excellent | Yes | Standard for foreign publications |
| Average (at phone) | Yes | Only for scans and textbooks with graphs | |
| TXT | Bad (no formatting) | No | Only for drafts and notes |
When converting, it is important to monitor the text encoding. The most universal one today is UTF-8, which correctly displays the characters of almost all languages of the world. If after conversion you see “crazy words” instead of letters, try changing the encoding in the reader settings or converting the file with other parameters.
Organizing your personal library and folders
Chaos in the file system of a smartphone can turn the reading process into torture. When there are hundreds of books in one folder without sorting, it becomes almost impossible to find the right one. Cool Reader allows you to create your own catalogs and filter books by authors, series or genres, but the basic structure of the folders must be laid down by the user.
It is recommended to create a root folder, for example /Books, and organize the structure within it according to genres or authors. For example: /Books/Fiction/Asimov or /Books/Technical/Android. This approach will simplify not only the search, but also the backup of your collection when changing devices.
☑️ Library organization
In the application settings, you can specify specific folders for scanning to hide technical documents or temporary files from the main library. To do this, go to Settings → Folders and add the necessary directories. This is especially useful if you store books on an external memory card SD cardwhere other data may also be located.
⚠️ Warning: Do not store books in Android system folders (for example, c
/Android/data), since when clearing the cache or deleting the application, these files may be lost without the possibility of recovery.
Setting up the interface and control gestures
The ergonomics of reading on a touch screen depends on the correct settings of the gestures. By default Cool Reader uses a tap in the center of the screen to open the menu, and swipes to scroll. However, these actions can be reassigned to suit you in the section Settings → Management.
For users of large smartphones (Pablet), it is convenient to set up scrolling by pressing the edges of the screen, so as not to reach the center with your finger. Volume adjustment is also available: the physical volume control buttons can be used to turn pages, which is very convenient when reading with one hand in transport.
The backlight and color temperature settings deserve special attention. Many modern smartphones have built-in blue light filters, but Cool Reader allows you to overlay an additional color filter on top of the text. Using warm colors in the evening promotes the production of melatonin and improves the quality of sleep after reading.
Secret autoscroll function
Turn on autoscroll mode in the control menu to read books without using your hands. The scrolling speed can be adjusted to suit your reading speed.
Synchronizing progress between devices
It often happens that you start reading a book on the subway on your smartphone, and continue at home on your tablet. In order not to search every time for the page you stopped on, you can use the progress synchronization function. In Cool Reader this function is implemented by storing position files in the cloud or a shared folder.
To set up synchronization, it is necessary that a reader is installed on both devices and access to the shared storage is configured (for example, through Google Drive or Dropbox). Progress files usually have an extension .cr3 or are stored in the application database, which can be exported.
An alternative method is to use services like Dropbox to store the books themselves. If the folder with books is synchronized, then bookmark files (if they are stored next to the book) can be pulled up automatically. However, this requires deeper technical adjustment of the Android file system.
Regular backup of the folder with books and progress files (.cr3) will protect your library from data loss when resetting your smartphone.
Solving common problems and errors
Despite the stability of operation, users may encounter certain difficulties. One of the most common problems is the absence of a book in the library list after downloading. This is usually solved by forcibly updating the list through the menu or checking file system access rights in the Android settings.
Another common problem is the incorrect display of Russian letters or hieroglyphs. This almost always indicates a problem with the file's encoding. In the reader settings, you can manually select encoding Windows-1251 or KOI8-R for old files, or re-encode them to UTF-8 on your computer.
- 🔋 Quick battery drain: disable the flipping animation and reduce the screen refresh rate in the reader settings.
- 📂 The file cannot be opened: check the integrity of the file, it may not have been downloaded completely (size 0 kb).
- 📱 Text is too small: use the two-finger zoom gesture or increase the base font in the settings.
⚠️ Attention: The interface and capabilities of the application may vary depending on the version of Android and the specific build of Cool Reader. Always check the official developer repository if critical errors occur.
FAQ: Frequently Asked Questions
Is it possible to read books directly from the Internet without downloading?
No, Cool Reader works only with local files. You need to first download the book to your device's memory and then open it through the app. Some third-party plugins can simulate streaming reading, but the standard functionality does not support this.
Why does the application not see books on the SD card?
In versions of Android 11 and higher, the rules for accessing external memory have become more stringent. You need to give the application special access to a folder on the SD card through the system permissions window or move the books to the internal memory in the folder /Books.
How to add your own cover for a book?
Cover covers are usually built into FB2 and EPUB files. If there is no cover, you can add it by editing the book file on your computer through the app Calibre. Simply inserting a picture into a folder will not work; the reader will not pick it up automatically.
Is it safe to use older versions of Cool Reader?
Using very old versions is not recommended, as they may contain security vulnerabilities and will not work correctly with new versions of Android. It is always better to use the latest build from a reliable source.
Does the application support audiobooks?
No, Cool Reader is intended exclusively for text formats. To listen to audiobooks, it is recommended to use specialized players, such as Smart AudioBook Player or the standard player of your smartphone.