This Desktop app is built by one developer:
Name "Tern" come from Arctic Tern, a type of bird
Newest version is 1.1.0, release at 2020-January
This software first develop in 2018 May, version 0.0.1, and still is 0.0.1 after one year (2019 November).
But in 2019 December I decide to take it seriously, make it a lot better and charged money for it.
Software like Aegisub is great, but Unfortunately they stop update at 2014, clearly part of the reason is because the software is free.
I want make something that's good but also can last for a long time, that's why this software have free and not free version.