Dictionaries in general, there are many dedicated threads here, for example
https://www.mobileread.com/forums/sh...ad.php?t=60689 and
https://www.mobileread.com/forums/sh...d.php?t=325203, or like this
https://github.com/koreader/koreader...ionary-support for KOReader.
Hebrew-anything dictionaries I'm not aware of anything free and even usable around there, I'd be curious to know too. The only thing which occurred to me was to wait for Asaf Bartov to finish his daunting transcription of the Ben Yehuda and to see about its conversion.
https://benyehuda.org/~asaf/full_dict.html