[FAQ] Why is the memory usage so high? How to release memory?

Reasily uses WebView(Google Chrome) to render EPUB content. Like a web browser, the more books you opened, the more memory it used. However, the memory will be released after books are closed.

There are several ways to close opened books and release memory:
  1. Remove opened books in the recent apps list of Android system. This is an unique feature of Reasily, each opened book acts like an app. Just remove a book from the recent apps list to close it.
  2. Long-press the back button to close the book you are reading.
  3. Use Close in the menu of book, which is the last item in the menu.

[FAQ] How to upgrade to Pro version?

Thank you for asking this.

When you try to use a Pro feature, the purchase dialog shows.

For examples:
(1) Advanced annotation styles like bold, italic and text color.
(2) Custom CSS function in the advanced options menu.
(3) Auto-sync in the data & synchronization menu.

[FAQ] Reasily 支援直排嗎?

是的。Reasily 使用 Android 提供的 WebView 元件(即 Chrome)來顯示 epub 中的 xhtml 頁面,因此對直排 CSS 的支援還不錯。

那麼,是否可以強制將橫排書籍轉直排呢?這得看情況。對於排版複雜的書籍,強制改為直排很可能會造成排版混亂。因此,Reasily 並直接不提供強制轉直排的選項。

不過,透過「自訂CSS」的功能還是可以辦到的。使用者可以嘗試用以下的 CSS 轉換成直排:
body {writing-mode: vertical-rl;}

如果排版亂掉,或者沒有作用,可以試著關掉下方的 Original 選項,來禁用 epub 本身的 CSS。


[FAQ] How to add books without copying them into Reasily?

In the file chooser dialog, after files are selected, click the [+] button rather than [Import] button, all the files will be added to the list without copying. Reasily reads them from the storage directly.

This is useful if you manage your epub files by yourself in your own storage folders.

Note: If you [Import] books into Reasily, the files will be copied into private storage of Reasily app, and the size you see in the application info will grow. After books imported, you can remove them from your download folder.

[FAQ] How to search for selected text on a search engine or website?

First, install this app: All in 1 Search

It lets you setting up websites and search engines to search for the selected text in any app.

After that, in Reasily, when you selected text, click the "..." button in the toolbox, the button of the "All in 1 Search" app will be there, click it and select an search engine to do the search.

Here are some example websites you can add to the All in 1 Search app:

[FAQ] How to go back to the bookshelf from an opened book?

There are several ways to close the book you are reading and go back to the bookshelf.
  1. Use the recent apps button on your device to switch back to the bookshelf or to other books. This is a feature of Reasily, every opened books acts like an app.
  2. Long-press the back button to close the book you are reading.
  3. Use Close in the menu of book, which is the last item in the menu.

[FAQ] Can Reasily show page numbers and total pages of epub?

Basically it can't. Because usually there is no page number information in an epub file. Therefore, an epub reader can only simulate and show incorrect page numbers. You can confirm this when you flipping pages in the Google Play Books app, you can see that the page number is not changed when flipping, because the page numbers are not real. I think it is meaningless to show such page numbers, so Reasily shows reading progress of whole book in percentage instead.

Some books have page numbers defined, e.g., publications downloaded from For these publications, Reasily shows the page numbers at the left or right side.

Reasily also shows reading progress percentage of current chapter in continuous scroll reading mode. In single page reading mode, Reasily shows page number and page count of current chapter that correctly matches how many pages you can flip in this chapter.

[FAQ] How to break words with hyphens?

It is possible with following custom CSS:
body {
  word-break: break-all;
  hyphens: auto;
For an example:

[FAQ] Why does the night mode not work on my device?

It is mainly caused by an old version of "Android System WebView" if your device is Android 5, 6 or 10.
Reasily uses it to display epub content. So you have to keep it updated in Google Play Store.
If your device is Android 7, 8 or 9, please update the Google Chrome app.
If the night mode still not works, please mail me the epub file with a screenshot, so I can find out the cause of the problem.

[FAQ] Why is my data not synced between devices?

Please check if the same account is logged in when enabling "Auto-sync data" or clicking "Sync now" on all your devices. You can "Log out" to change the account.
Make sure the internet connection is stable, then click "Sync now" to make it sync again. If the syncing message disappeared automatically, the data is synced successfully.
Please also check if the epub files are not different versions of a book on your devices. Data will not be synced between different versions of a book.
You can enable the "debug log" and "mail me" it so that I can check if there are some failures during synchronization.

[FAQ] Where's my data stored in Google Drive?

It goes to a hidden folder in your Google Drive. It is called App Folder. You can see the usage of that folder on the desktop version website of Google Drive. Click the ⚙ gear button » Settings » Managed Apps.

[FAQ] How to turn off animations for e-ink devices?

There's an "Animation off" option in Advanced settings. Reasily will try to disable animations when possible.

[FAQ] Can I install Reasily on my PC?

It is possible with an Android emulator like Remix, BlueStacks or Android Studio AVD.

[FAQ] Can I install Reasily on iPhone or iPad?

No. There's no iOS version of Reasily. And sorry there's no plan to do it.

[FAQ] Why does Reasily ask me to upgrade again?

Some Reasily Pro users have reported that Reasily asks them to upgrade again.

This usually happens on your second device.

If you have multiple Google account, the app should be installed with the account paying for pro before. That is, the account should be selected in drawer menu of Google Play when installing Reasily. Otherwise, Google Play thinks Reasily is owned by another account and is not paid. You might have to uninstall and install Reasily again with the correct account. Please check if the account shown in purchase dialog is correct.

It is also possible that Google Play on your second device hasn't updated the purchase state yet. You can clear memory, and reopen the Play store to let it refresh purchase state. You can also try rebooting the device. And please make sure the internet connection is stable.

If it is still not working, please tell me. I can refund money or give you a redeem code to make it work.

You can also help me fixing the problem by enabling the "Debug log" option in the "Feedback & help" menu. Then restart Reasily and "Email me" the debug log file. Thank you for your help!

Reasily - EPUB Reader

Reasily is a fast and handy EPUB3 reader. It can highlight text, take notes and sync them across devices. With many EPUB3 features supported.

Get it on Google Play: