Current best canto <> English voice to text app ?

I’m due in HK I’m a few days to visit my grandma. I don’t speak canto and she doesn’t speak English. I’d love to be able to communicate with her and technology has advanced so much in the last few years that now it might actually be feasible without a human translator. I just want to say basic things to her like how are you, what are your plans, where to eat etc.

Is there a decent enough app that I can use for this? Google translate recently added Cantonese, is this good enough? Any other alternatives? Would love any advice!!