Is there any way to use renshuu without WiFi? I usually can't acces the whole app without it even though I just want to learn regularly without using any online features.
There is not. All of the data in Renshuu lives in a server instead of being saved locally to your device, so everything the app does requires an internet connection even if it doesn't seem like it's an "online feature".
It is something that I hope to do one day in the future, but renshuu is somewhere along the lines of 500,000 lines of code, and I'm the only developer! Even limiting it to just the quizzing system would be a pretty daunting feature, but one that I hope becomes possible one day.
It's an old post, but I still hopes it gets read. I'm finding extremely usefult the Japanese Lessons and Grammar Library, if that couls be used offline would be awesome
If I understand correctly, it would require writing new code for almost the entire app? That would be extremely difficult and time-consuming (unless that's something else I'm thinking of)
Nope, that's exactly why - I am the only dev for renshuu (the entire company is just my wife and I), so at the moment, a complete (or even partial) offline rewrite is not possible.