Header image of a close-up of a soroban

About this site

The site mainly started around the idea of an online generator of exercises to practice the soroban. It evolved a bit with the addition of pages with mental calculation software; then the virtual soroban and its "tutorials" and the possibility to get an operation being displayed on the virtual soroban. A forum was needed to overcome the limitation of disqus, which is a great commenting system anyway.

Donations

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Donations will be used for the possible cost of the site that may arise in the near future with the new pricing policy of Google App Engine. Otherwise, I will take them as a tip for the work I made on this site. We thank any donor in advance of their good gesture.

You may need a currency converter from/to €, you could give a try to the one at xe.com. Beware that Paypal does not use the same exact exchange rate that xe.com

Technologies that are used to create this site

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Cookies

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On the forum, a cookie is used to remember the username.

Tracking

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