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Encyclopedia 2 by Informant icon
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Encyclopedia 2 by Informant

Chess King · Games · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide EST
$291
Likely $97 to $872
New ratings
Tracking
Daily counts start building from today
Rating
4.9 of 5
15 ratings in this store
Countries it ranks in
0
was 0 on Oct 15, 2026

Revenue

Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / YEAR · WORLDWIDE
$3.5K
0.4 new ratings a month on average since launch
EST. LIFETIME DOWNLOADS
525 to 1.5K
Estimated from ratings count
WHERE ITS USERS ARE · SHARE OF RATINGS
  • United States 15 ratings36%
  • Germany 6 ratings14%
  • France 6 ratings14%
  • Brazil 4 ratings10%
  • Canada 2 ratings5%
  • Turkey 2 ratings5%
  • United Kingdom 1 ratings2%
  • Spain 1 ratings2%
HOW SURE ARE WE
Not in any grossing chart, so this comes from ratings growth (0.4 new ratings a month on average since launch): revenue grows with new ratings, more slowly for apps that collect ratings fast. Tested on 418 apps with verified revenue: typically off by about 2 times, and big earners tend to come out low. Countries we don't track (and Google Play in China, which doesn't exist) aren't included, and neither are ads or web payments. Gross revenue before store fees.
RATINGS
15
AVG RATING
4.87
PRICE
Free
AGE
9.3y
LAST UPDATE
3181d ago
VERSION
1.2
SIZE
44 MB
AGE RATING
4+

Last 29 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
0 / 29
COUNTRIES NOW
0 (was 0)
EST. REVENUE FROM CHARTS, DAILY · BOTH STORES ONLY EST
Show daily values
Sep 24, 2026not in a grossing chart
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Oct 22, 2026not in a grossing chart
Best rank Sep 24, 2026: not ranked. Now: not ranked. Days at zero are days outside every grossing chart.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
1 purchase listed
  • Full Course$9.99
Top in-app purchases as listed on the App Store, in local prices.
REVIEW MOMENTUM
Too few reviews
Fewer than 3 recent written reviews in this country.
RELEASE CADENCE
0 updates in 90 days
  • Typical gap between releases173 days
From the last 3 versions listed on the App Store.
RATING BREAKDOWN
15 ratings
5★87%
4★13%
3★0%
2★0%
1★0%

Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

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Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

chess7program6learn4moves4moves board3elo3course3game3tasks3lessons3test3application3combinations2vol2player2based2contains2tactics2internet2series2levels2players2knowledge2gives2

What's new in 1.2

• App is updated for iPhone X • New home screen • Animated playback of theory with sound • Date of reading the theory • Disabled automatic playback of refutations • Option to reset password • Renaming of account • Various fixes and improvements

Released Jul 8, 2017. Current version shipped Feb 5, 2018.

Store description

Encyclopedia of Chess Combinations vol. 2 (ECC vol. 2) is the ultimate educational tool with systematic, carefully selected content for player with ELO 2200. The material is based on the latest edition of the eponymous bestselling book released by Chess Informant. This volume contains chess combination of Intermediate Level (ELO 2200) for solving, all hand-picked and sorted by theme to provide the most exciting and efficient training experience possible! Unlike disorganized, basic tactics you can learn all over the Internet, this Chess Sphinx will challenge you consistently and systematically, unveiling new intricacies right when you decide you have mastered that particular tactic. This course is in the series Chess King Learn (https://learn.chessking.com/), which is an unprecedented chess teaching method. In the series are included courses in tactics, strategy, openings, middle game, and endgame, split by levels from beginners to experienced players, and even professional players. With the help of this course, you can improve your chess knowledge, learn new tactical tricks and combinations, and consolidate the acquired knowledge into practice. The program acts as a coach who gives tasks to solve and helps to solve them if you get stuck. It will give you hints, explanations and show you even striking refutation of the mistakes you might make. The program also contains a theoretical section, which explains the methods of the game in a certain stage of the game, based on actual examples. The theory is presented in an interactive way, which means you can not only read the text of the lessons, but also to make moves on the board and work out unclear moves on the board. Advantages of the program: • High quality examples, all double-checked for correctness • You need to enter all key moves, required by the teacher • Different levels of complexity of the tasks • Various goals, which need to be reached in the problems • The program gives hint if an error is made • For typical mistaken moves, the refutation is shown • You can play out any position of the tasks against the computer • Interactive theoretical lessons • Structured table of contents • The program monitors the change in the rating (ELO) of the player during the learning process • Test mode with flexible settings • Possibility to bookmark favorite exercises • The application is adapted to the bigger screen of a tablet • The application does not require an internet connection The course includes a free part, in which you can test the program. Lessons offered in the free version is fully functional. They allow you to test the application in real world conditions before releasing the following topics: 1. Annihilation of defence 2. Blockade 3. Clearance 4. Deflection 5. Discovered attack 6. Pinning 7. Demolition of pawn structure 8. Decoy 9. Interference 10. Double attack

See this store page in another country

Prices, ranks and reviews are per country. Revenue above is already worldwide.

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