Just OK for web-page translation in Safari
Works okay (online) for translation of Japanese web pages to English using Safari share button - which was what I got it for. But the quality of the translation is very poor - it gives you a general idea of the meaning, nothing more. Its worse than Google translate (yeah - its that bad) - seems to translate kanji by kanji, not whole words. And it doesnt work on some tabs and headers or any secure websites.
Apple Watch translation is poor and slow (e.g. "Good afternoon" is translated as "良い午後).
No speech or photo recognition for Japanese.
No offline Japanese mode (not that I need it as I live in Japan, but could be useful for tourists who have limited internet access).
英語先生 about
Yandex Translate, v2.81