There are a variety of online simulators, as well as some Apple and Android applications, for practicing mental calculation. GMCA’s simulators can be found in the GMCA Simulators page of this website.

Memoriad software can be used to practice mental calculation and memory. For calculation, the main Memoriad software contains six “standard” tasks: addition, multiplication, square roots, calendar dates, division, and Flash Anzan. Memoriad also offers different task specific softwares that provide further practice options for one of the six standard tasks.

GMCA panelist Daniel Timms includes a variety of simulators (and also guides) on his website.

His website also includes information for the simulator Pegasus, maintained by George Lane.

A customizable Flash Anzan simulator is available from SumoMath here.

SumoMath also provides an English-language abacus learning platform.

Soromath contains highly customizable practice options and a large variety of types of questions (click the button under “mode” to view options), allowing you to build your desired practice program.

QuantGuide contains a mental math simulator for basic operations. The range of the variables and the total time can be customized.

Zetamac has a very similar simulator.

Teoset offers a customizable simulator that provides for multi-operation questions. The simulator, however, will only present a single question at a time.

Mental Math Trainer has a simulator that allows for practice of basic operations with a customizable amount of digits. The simulator provides a timer that times each individual question.

NumberEmpire is a German website that offers a variety of more advanced math/calculation tools. The website is a “complex calculator” rather a simulator.

MathHeads has an arithmetic simulator that can be used in multi-player (or you can compete against a stranger). The application does not contain customization other than including three different levels.

DrillYourSkill offers an addition, subtraction, and multiplication simulator that includes training statistics and a leaderboard. The simulator includes moderate customization although question options are limited to lower difficulty levels.

Katie Kermode — a memory athlete —has an application available for the use of practicing calendar dates here.