There might be some in Japanese, I’ll come back here and post if I find one. At least the label scan could work I guess!

Would be very useful to have one, honestly havent thought of using an app much. 
Apart from the ones you mentioned the only other one I could find is called SakeWiz but gets mediocre reviews

What do you use to track what sake-varieties you've tasted? I would love to find an app that makes this easier, something similar to vivino with label scan etc. 

Any recommendations? I have tried Sakenomy (label scan does not really work), Sakefan world (no label scan and is basically just the website with the same name packaged in an app) and Sakenowa (no scan but otherwise quite good app).

App similar to Vivino but for sake