About this app

Subtraction Memorizer helps you memorize the most important subtraction tables.

General Features
+ Provides interactive lists covering the most important subtraction facts.
+ A practice area to improve accuracy.
+ A timed area to improve speed.
+ Keeps track of overall progress and best times.

There are five general areas:

Subtraction Tables provides a stress free learning environment. It's a modern take on subtraction flash cards. This area displays the entire single digit subtraction table, a row at a time. You can show or hide the answers to any subtraction problem at any time. There are no questions, no time limit, no data tracking.

Practice is where your subtraction memorization is tested. Questions are randomly generated. It's your job to enter the answer digit by digit (there is no multiple choice). The number of correct and incorrect attempts are tracked and saved for each subtraction fact. Incorrect problems are listed at the end of each session and you'll have the option to repeat all the questions, repeat only on the incorrect attempts, or shuffle the questions all together.

Time Trials is where you put all that practice to the test: How fast can you answer 10 subtraction questions? Compete against yourself or compare your times with friends and people all over the world!

Time Records keeps track of your top 10 fastest completion times for each subtraction problem set attempted in the Time Trials area. Displays your rank, initials, time, and date for each record. Note: to set a record, you must answer 8 of the 10 questions correctly.

Data is where you can see how you're doing for each subtraction fact. The result for each fact is displayed as a colored box inside an subtraction chart. The colors range from green to red (with green meaning good and red meaning not-so-good). Pressing a box will show more details for that fact: Number Correct, Total Attempts, Percentage, and Grade.

Look for more subtraction games and features to be added in the future!

This is a free-to-download, ad-supported app.

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MATH Domain Development

New features

(1.0.15)
+ Updated target SDK to Android 13.
+ Re-added support for older versions of Android (5+).
+ Updated AdMob SDK.

App Permissions

Allows access to the vibrator.
Allows applications to open network sockets.
Allows applications to access information about networks.
Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.