In this article, I explain LINE Simulator for bot developer. It works okay, but it was a web application, which was not perfect for Mac or PC.
This time I moved the solution to Electron app so that it is native app on Mac and PC.
Go to Release of my GitHub repo and download the app. For Mac, download the zip file and unzip it. For Windows, download setup.exe and run the installer.
It's super simple.
Check "always on top" if you want the simulator runs on top of everything.
Click Connect. (or POC if you want to do POC mode)
Run your bot by specifying http://localhost:8080 as LINE Platform address so that your bot talks to the simulator rather than actual platform.
This application is far from completion and need your feedback. Please play with it and let me know any issues or suggestions.