In today's fourth (penultimate) part of the article on e-book applications for the Android operating system, we will explore just one, but extensive topic: .
Summary of the previous three parts of the articleIn detailed reasons why extensive testing of applications for their suitability for installation on e-books was necessary, along with a list of tested .
In of the article, the following two groups of applications were discussed: and .
In of the article covered two more groups of applications: and
Of course, the slow black-and-white screens of e-books are not very suitable for games; however, surprisingly, many games turned out to be quite functional.
The technical limitations of the screens played a role, and among the games that successfully passed the tests, there will be no 'runners' or 'shooters'.
Suitable for e-books were logical, text, and math games. In a word – truly educational games that will be beneficial for children.

But of course, one must consider the different levels of difficulty of the tested games: some are suitable for younger schoolchildren and preschoolers, while others can even stump adults.
Another problem that emerged during testing is the significant impact of artifacts on the screen image quality.
They are related to another technical issue of the screens: the presence of 'ghosting' from the previous 'image' on the screen.
While manufacturers have learned to successfully combat this phenomenon when displaying texts (in ONYX BOOX e-books, this technology is called Snow Field), on graphical or mixed pages, 'ghosting' reveals itself in all its glory.
Since games are primarily based on 2D graphics, in some cases, the problem can significantly hinder the gaming process.
To combat artifacts, it is recommended to refer to the eBook's instructions, and if the book offers a forced screen refresh option using hardware or on-screen buttons, it is advisable to use this feature to 'redraw' the screen when the artifact level becomes excessive. For example, in eBooks from the series and for children this can be done by long-pressing the right side button.
Now let’s move on to the materials of the fourth part of the article.
The application descriptions include the following data:
- name (exactly as it is listed in the Play Google store; even if there are spelling or stylistic errors there);
- developer (sometimes, applications with the same name can be released by different developers);
- purpose of the application;
- required Android version;
- link to the verified APK installation file in MacCenter;
- link to the application in the Play Google store (for more detailed information about the application and reviews; the APK file cannot be downloaded there);
- link to download the APK installation file from an alternative source (if available);
- note indicating possible features of the application;
- several screenshots of the working application.
Games were tested on ONYX BOOX eBooks with the Android 4.4 operating system and Games
Checkers [Шашки] (Lukasz Oktaba)
1. Chess [шахматы] (Chess Prince)
2. Chess [шахматы] (Lukasz Oktaba)
3. Dominoes (Ricardo Amorim)
4. Russian Crosswords [Кроссворды на русском] (Litera Games)
5. English Crossword puzzle [Кроссворды на английском] (Litera Games)
6. Anglo-Russian-Spanish Crosswords [Кроссворды: английские слова] (Litera Games)
7. Crosswords for Kids Lite (Lyubov Zhivova)
8. Gomoku [крестики-нолики] (Gamesdevlearn)
9. Gomoku [крестики-нолики] (Tic Tac Toe) (MikeGol)
10. Sudoku (AppDeal)
11. Sudoku (Lukasz Oktaba)
12. Hangman (Jajaz.org)
13. Logic Puzzles — Play (Infokombinat)
14. Millionaire 2019 (Millionar Apps)
15. Word Search (Wordloco)
16. Words [Балда] (MyDevCorp)
17. Words from Words (RedboxSoft)
18. Guess the Word (Andy Brow)
19. Guess the Word (cbyc soft)
20. Now let’s look at the applications in list format.
. Application name:
#1Checkers [Шашки] Developer:

Łukasz Oktaba</b Purpose: Checkers game>
Required Android version: >=4.1
Link to the ready
APK file
Google Play
alternative APK source
Note: The application works without issues.
Screenshots:
![]() | ![]() |
#2Checkers [Шашки] Chess [шахматы]

Łukasz Oktaba</b Chess Prince
Purpose: A chess game with volumetric (3D) pieces
Required Android version: >=2.3
APK file
Google Play
alternative APK source
Note: When playing, it’s better to choose a more contrasting theme – 'white' or 'black'. Screenshots show options with different themes.
Screenshots:
![]() | ![]() | ![]() | ![]() |
#3Checkers [Шашки] Chess [шахматы]

Łukasz Oktaba</b Łukasz Oktaba
Purpose: A chess game
Link to the ready
APK file
Google Play
alternative APK source
Note: On 6-inch readers, the chessboard size is small, making it uncomfortable to play. You can play on readers larger than 6 inches: the board is displayed larger both absolutely and relatively (see examples in screenshots).
Screenshots:
![]() | ![]() | ![]() | ![]() |
#4Checkers [Шашки] Dominoes

Łukasz Oktaba</b Ricardo Amorim
Purpose: A domino game
Required Android version: >=4.4
APK file
Google Play
alternative APK source
Note: Only in English, but everything is clear.
Screenshots:
![]() | ![]() | ![]() |
#5Checkers [Шашки] Russian Crosswords [Кроссворды на русском]

Łukasz Oktaba</b Litera Games
Purpose: Crosswords
Required Android version: >=4.0.3
APK file
Google Play
alternative APK source
Note: The game background is unsuccessful; help during the first launch is poorly legible; however, the tasks and input fields for crosswords are bright and contrasting enough. It’s playable.
Screenshots:
![]() | ![]() | ![]() | ![]() |
#6Checkers [Шашки] English Crossword puzzle [Кроссворды на английском]

Łukasz Oktaba</b Litera Games
Purpose: An educational crossword game, questions and answers are in English.
Required Android version: >=4.0.3
APK file
Google Play
alternative APK source
Note: The game background is unsuccessful; help during the first launch is poorly legible; however, the tasks and input fields for crosswords are bright and contrasting enough (a forced screen refresh helps with graphic issues). It’s playable.
Screenshots:
![]() | ![]() | ![]() |
#7Checkers [Шашки] Anglo-Russian Spanish Crosswords [Кроссворды: английские слова]

Łukasz Oktaba</b Litera Games
Purpose: An educational crossword game, questions are in Russian or Spanish, answers are written in English.
Required Android version: >=4.0.3
APK file
Google Play
alternative APK source
Note: The game background is unsuccessful; help during the first launch is poorly legible; however, the tasks and input fields for crosswords are bright and contrasting enough (a forced screen refresh helps with graphic issues). It’s playable.
Screenshots:
![]() | ![]() |
#8Checkers [Шашки] Kids Crosswords Lite

Łukasz Oktaba</b Lyubov Zhivova
Purpose: Simple crosswords for young children.
Required Android version: >=4.0.3
APK file
Google Play
alternative APK source
Note: The graphics in black-and-white view are poor but acceptable. Contains only 8 crosswords.
Screenshots:
![]() | ![]() |
#9Checkers [Шашки] Gomoku [Крестики — нолики]

Łukasz Oktaba</b Gamesdevlearn
Purpose: A tic-tac-toe game ‘5 in a row’.
Required Android version: >=5.0
APK file
Google Play
alternative APK source
Note: Everything works fine.
Screenshots:
![]() | ![]() |
#10Checkers [Шашки] Gomoku (Tic Tac Toe) [крестики — нолики]

Łukasz Oktaba</b MikeGol
Purpose: A tic-tac-toe game in the varieties '5 in a row' and '3×3'.
Required Android version: >=2.3.3
APK file
Google Play
alternative APK source
Note: Everything works fine.
Screenshots:
![]() | ![]() | ![]() |
#11Checkers [Шашки] Sudoku

Łukasz Oktaba</b AppDeal
Purpose: A Sudoku game.
Link to the ready
APK file
Google Play
alternative APK source
Note: Everything works fine.
Screenshots:
![]() | ![]() | ![]() |
#12Checkers [Шашки] Sudoku

Łukasz Oktaba</b Łukasz Oktaba
Purpose: A Sudoku game.
Link to the ready
APK file
Google Play
alternative APK source
Note: Possible numbers are displayed in very small digits. 'Conflicts' that should be shown in red are poorly distinguishable on a black-and-white screen. However, it is still playable.
Screenshots:
![]() | ![]() | ![]() | ![]() |
#13Checkers [Шашки] Hangman

Łukasz Oktaba</b Jajaz.org
Purpose: A game of guessing letters in a word.
Required Android version: >=4.4
APK file
Google Play
alternative APK source
Note: Everything is functioning normally.
Screenshots:
![]() | ![]() | ![]() | ![]() |
#14Checkers [Шашки] Logical Tasks - Play

Łukasz Oktaba</b Infokombinat
Purpose: Game, players need to provide answers to text-based logical tasks.
Required Android version: >=4.0
APK file
Google Play
alternative APK source
Note: The background doesn't look very good, but the text is legible. You need to agree that you are 16 years old and that advertisements will be shown to you. Works offline.
Screenshots:
![]() | ![]() | ![]() |
#15Checkers [Шашки] Millionaire 2019

Łukasz Oktaba</b Millionär Apps
Purpose: The game 'Who Wants to Be a Millionaire'.
Link to the ready
APK file
Google Play
alternative APK source
Note: The game is for ages 12+ (may contain sexual innuendos).
Screenshots:
![]() | ![]() |
#16Checkers [Шашки] Word Search

Łukasz Oktaba</b Wordloco
Purpose: A game for finding words on a grid filled with letters.
Required Android version: >=3.0
APK file
Google Play
alternative APK source
Note: The game somehow could not disable hints, which simplified it too much.
Screenshots:
![]() |
#17Checkers [Шашки] Words [more commonly known as 'Balda']

Łukasz Oktaba</b MyDevCorp
Purpose: A game known as 'Balda': forming words from the letters of another word by adding one letter at a time.
Required Android version: >=4.4
APK file
Google Play
alternative APK source
Note: Everything is functioning normally.
Screenshots:
![]() | ![]() |
#18Checkers [Шашки] Words from Words

Łukasz Oktaba</b RedboxSoft
Purpose: A game for forming words from the letters of another word.
Required Android version: >=4.4
APK file
Google Play
alternative APK source
Note: Upon launch, it states that Google Play Services are required; but it works even without them.
Screenshots:
![]() | ![]() | ![]() |
#19Checkers [Шашки] Guess the Word

Łukasz Oktaba</b Andy Brow
Purpose: A game similar in action to 'Who Wants to Be a Millionaire'.
Required Android version: >=5.0
APK file
Google Play
alternative APK source
Note: The kitten animation looks unattractive on the e-book screen, but it doesn't interfere with reading and answering questions.
Screenshots:
![]() | ![]() |
#20Checkers [Шашки] Guess the Word

Łukasz Oktaba</b cbyc soft
Purpose: A game where players answer questions from a presented set of letters.
Required Android version: >=4.0.3
APK file
Google Play
alternative APK source
Note: Some questions are tricky and require real knowledge.
Screenshots:
![]() | ![]() | ![]() |
The next part will cover two more categories of applications: Cloud Storage and Audio Players.
To be continued!
Source: habr.com
























































