Currently I use a mix of wanikani, bunpro and anki to study japanese. With anki and wanikani I’m able to study offline through anki’s native app and smouldering durtles which I can emulate on my computer. It would be really really nice to be able to do my SRS anywhere without having to worry about an internet connection.
Anki (in my opinion) has perfected this idea, being able to access all of your lessons and reviews by downloading them locally on your device with a simple “sync” button. That being said though, bunpro is the only thing keeping me from not studying grammar, it’s a great service that I’d like to continue using.