A software to practice anzan
Anzan is the mental calculation you perform while visualizing a soroban in your head.
A flutter app 
To help me practice, I rewrote the previous python program in flutter. It has been renamed "Anzan" for simplicity.
Simple configuration
You can choose how many numbers to add, how many digit each number have, the time between the display of each number (called timeout) and the time a number stays on screen (called flash).
Speech synthesis
You can also have each number said to you by a speech synthesizer. It required a working Internet connection as requests are made for each sound.
Replaying a sequence
You can replay any sequence for your convenience. Just press the 'Replay' button if you missed some number.
Misc. options
You can use it full screen, and/or in a continuous mode where you don't have to enter an answer and to interact with the keyboard. It goes on ad infinitum.
Try it in your browser
This is the easiest way to try our little app.
It's a Progressive Web App that can be installed as a "native" app on your system, if you wish to do so. If your browser does not offer you the option, just check in the option menu.
Note: You need an additional extension with firefox.
Download a native app
You can download the latest version (0.6.1) in the Releases page on github, with builds available for:
As a backup solution, you can install the Progressive Web App as a native app. Support is limited on Safari but all is not lost. Give it a try.
Screencasts
- The first one demoing a standard practice of anzan
- The second one using the speech synthesis to practice the soroban
The previous tools
You can still access the first tool entirely developped in html/css/js or the twin python software:
The python tool is a GUI made with pyQt. It is the same as the above web version, but can be used without a browser. And offline, if you don't use the TTS feature.
You can download the latest version that was made 0.5.4
- Windows [installer] (31 MB)
- Windows binary in a [zip file] (39 MB) or a [7z file] (26 MB)
- [source code] (449 KB)