Strictly speaking, this is not an emulator, but a remote access tool. Keep your physical F-789SGA II connected via USB to a computer, and use screen capture software to stream the display.
Websites like FooPlot or Web2.0calc do not work. You need a simulator built for Chinese or Taiwanese exam calculators (e.g., the Canon F-502G or similar Sharp EL series). While not identical, they handle 95% of the same functions: canon f-789sga ii emulator
If you are tech-savvy and want to build your own interface for the Canon logic, you can use web-based calculator engines. Strictly speaking, this is not an emulator, but
: While some standard versions might have a 90-day trial period, recent promotional offers for professionals have featured no expiration date . this is not an emulator