Cities of the World

My first app of 2015—Cities of the World—continues my successful series of Geography Apps and is translated into 15 languages. It has been released for both platforms:


Get it on Google Play

The English description of the game is the following:

Guess and spell the names of the 100 most famous cities of the world using the pictures of their landmarks (New York, London, Beijing and so on).
– You won’t get stuck if you don’t know the answer because the app allows you to guess each word letter by letter and will immediate show if the next letter is incorrect!
– The cities are arranged in the order of increasing difficulty and are divided into two levels. If you think that the first questions are too easy, just proceed forward until you encounter really hard ones.
– Two quiz modes: 1) for those who like spell city names and 2) for those who prefer to choose from 4 answers.
– Very entertaining learning experience for all geography and traveling fans!

This app is translated into 15 languages: English, German, French, Spanish, Portuguese, Italian, Russian, Swedish, Dutch, Danish, Norwegian, Japanese, Chinese, Korean, and Turkish languages.

*****

Acknowledgements:
icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

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My Best Apps of 2014

In the end of the year, I would like to share some of my data and assign “Best Apps” in Geography and Chemistry categories.

I will remember 2014 as the Year of Quizzes. Since Hydrocarbons appeared on iOS on January 31, I have released more than 40 distinct quizzes. In September, most of them were published on the Google Play Store as well. And these quizzes were much more successful than my first apps released last year. So far I have 578k downloads for iOS and 215k downloads for Android. Total earnings are well higher $20k.

Geography

The most profitable iOS app: 50 US States – $4k


Get it on Google Play

The most downloaded iOS app: European Countries – 55k


Get it on Google Play

The most profitable Google Play app: Swiss Cantons – $650


Get it on Google Play

The most downloaded Google Play app: Capitals of the World – 38k


Get it on Google Play

Chemistry

The most profitable and most downloaded iOS app: Inorganic Acids – $800 and 31k downloads


Get it on Google Play

The most profitable Google Play app: Chemical Substances – $66


Get it on Google Play

The most downloaded Google Play app: Functional Groups – 14k


Get it on Google Play

So it’s clear that Geography is more popular than Chemistry and it’s likely that I’ll continue moving in this direction. A funny fact for me is that the most promising app of recent months Flags of the World hasn’t won in any of 4 categories. Let’s see how it will change in 2015!


Get it on Google Play

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Provinces of Turkey

I was asked to prepare an app about Provinces of Turkey. I agreed because it was an excellent opportunity to get a translation into Turkish that can be potentially used in my other apps and the Turkish app market is going to grow.

The English description of the game is the following:

Learn all 81 provinces of Turkey: from Istanbul and Ankara to Erzurum and Van.
There are 4 different quiz modes about:
* names of all Turkish provinces
* their location on the map of Turkey
* two-digit province numbers (license plate codes)

Become an expert in geography of Turkey!

This app is translated into Turkish language.

*****
Now I am mostly doing updates for my previous apps. When Apple releases a new iOS, the review process is usually slow. This app has waited for review for 11 days. Meanwhile, the Google Play version was published:

Get it on Google Play

Acknowledgements:
I am grateful to Mert for his idea of this app and for his translation into Turkish. It is a quite difficult language, and I wouldn’t be able to translate the app myself using Google Translate.

Icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

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Amino Acids v. 1.3


Get it on Google Play

Review of the app on the Pulse of Apps: http://pulseofapps.com/smotrovaya/147 (in Russian)

Following the improved Android version, I updated the iOS version of Amino Acids. Major changes are:
– All flashcards are available for free
– The new “Challenge” mode (multiple-choice questions about all 43 compounds)
– Swedish localization
– The updated app icon

The app is free until the end of this week, so hurry to download it and enjoy the new game mode.

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Ads Stats

I haven’t started experimenting with different ad networks yet and use standard solutions in my apps: AdMob (banners and interstitials for iOS and banners for Android) + iAd (only banners for iOS). Since Android versions of apps appeared very recently, I have a reliable stats only for iOS.

Ads are mediated through AdMob with the “Optimize AdMob Network” option checked. It results in a much higher number of impressions and higher eCPM for AdMob than for iAd, but I found that this scheme generates the greatest income. It’s important to remember that AdMob works everywhere, while iAd is available only in 16 countries.

Below, I show the Ads Stats for a typical week in August-September. There are always daily fluctuations in income with Saturday usually being the best day.

The numbers are self-explanatory for those in mob dev business. My 46 apps bring about $150 and 140k impressions a day. Fill rates are very high and the cost per click is about 15 cents. Of course, these number may vary between apps and countries. Here is the stats for the most profitable app Flags of the World (AdMob banner, AdMob interstitials, iAd banner):

Banners are shown constantly interchanging AdMob/iAd while interstitials are shown after every 15 questions. I’d like to point out that there is an in-app-purchase to remove ads for $0.99 and thus all these stats may be slightly disturbed comparing to actual app usage.

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Financial Report – September 2014

All important apps have been rewritten for Android and now I have 46 apps on the Apple App Store (iOS) and 38 apps on the Google Play Store (Android).

Here is my income from Jan 2014 (about $15.5k so far):

In January, I was earning on average $3.5 a day. Since August 20, my daily income haven’t fell below $150 / day. Total income in August is $4,198. This amount is comparable with my salary that I had 2 years ago as a chemistry postdoc at Berkeley.

75% of money are from showing ads and only 25% from sales and in-app-purchases (next week, all my apps can be downloaded for free).

The most profitable are Geography apps, such as:

50 US States (iOS, Android) $2,532 (16.5% of total income).
European Countries (iOS, Android) $2,098 (13.6%).
Flags of the World (iOS, Android) $1,448 (9.5%).

Localization into 9 languages was a very clever decision. United States accounts for 28.4% of total income, Germany 10.9%, Russia 8.8%, France 6.7%, and so on.

The Google Play store is very different from the Apple App store in download trends, search optimization and algorithms. By now, the income from Android apps is just $15.29 but it is constantly growing and I’m just in the beginning of understanding this platform.

Many thanks to everyone who supports me. I will be glad to answer your questions and hear your suggestions how to improve my apps.

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Filed under Android, Developer Blog, Finance, Geography

Chemical Substances

While I am busy with Android, my 47th iOS app Chemical Substances has been approved (after 10 days waiting for review). This is the collection of quizzes on 200 most basic chemical substances: both organic and inorganic. With the beginning of an academic year, I see the growing interest to my chemistry apps.

The English description of the game is the following:

Learn 200 chemical substances that are studied in introductory and advanced chemistry classes:
* systematic and trivial names
* structures and formulas
* organic, inorganic, and organometallic compounds
* two different quiz modes
* 100 easy and 100 difficult chemicals

*****
And it appears simultaneously on the Google Play:
Get it on Google Play

Acknowledgements:
icons for buttons were downloaded from iconmonstr or were created with Font Awesome.

Thanks!

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Important Geography Apps on Android: Flags of the World, 50 US States, and European Countries

Three geographic apps that are performing very well on iOS (my top three apps of August in terms of income) are now available on the Google Play Store. And they are absolutely FREE, without in-app-purchases and questions / modes closed behind paywalls.

Flags of the World (Android)
Get it on Google Play

50 US States (Android) got a new mode Time Game. And all questions are free now.

Get it on Google Play

And finally, European Countries (Android) with a new neater icon.

Get it on Google Play

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Hydrocarbons and Amino Acids on Android

I continue adding my apps to the Google Play. Recently, two chemistry apps appeared there: Hydrocarbons (Android):
Get it on Google Play

and Amino Acids (Android):
Get it on Google Play

They are not the exact copies of their iOS counterparts. There are several major improvements:
1) There are no IAPs: all questions in Hydrocarbons and flashcards in Amino Acids are available for free. And both apps are free as well.
2) There are new multiple-choice modes that cover all compounds and provide a nice variety to the existing letter quizzes.
3) Both apps are brought to the latest standards of my quizzes: 14 letters, scalability of all elements, a different layout of the main menu.
4) There were multiple fixes and changes in localization, icons, and so on.
5) In my all Android apps, the language can be chosen in the game Settings rather than in the device Settings that is much more convenient and looks very nice.

The same updates will come to iOS in due time. All other quizzes will be added to Google Play soon. I am updating the corresponding parts of this site and I am always glad to hear your suggestions and ideas about my apps.

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Famous Operas and Composers App debuts on Android

Today is the big day: Famous Operas and Composers is my first app to appear on Android devices.

  Get it on Google Play

The app is the essentially rewritten iOS verison. I wrote about it in this blog when it was published two months ago: https://asmolgam.com/2014/07/04/famous-operas/.

After several days-weeks-months of development, my apps will start appearing on the second platform. First, on Google Play. Then I may think about other Android stores. It is the time to celebrate. It is the time to work even harder to transfer all other quizzes during the next several weeks.

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